Centripetal force keeps an object in circular motion Rotation and Revolution
|
|
- Andrea Merritt
- 6 years ago
- Views:
Transcription
1 Centripetal force keeps an object in circular motion Rotation and Revolution Two types of circular motion are and. An is the straight line around which rotation takes place. When an object turns about an internal axis that is, an axis located within the body of the object the motion is called, or spin. When an object turns about an external axis, the motion is called. 1
2 10.2 Rotational Speed The turntable around its axis while a ladybug sitting at its edge - around the same axis Rotational Speed Types of Speed is the distance traveled per unit of time. A point on the outer edge of the turntable travels a greater distance in one rotation than a point near the center. The is greater on the outer edge of a rotating object than it is closer to the axis. The speed of something moving along a circular path can be called because the direction of motion is always tangent to the circle. 2
3 Linear Speed Example Curtis favorite disco record has a scratch 12 cm from the center that makes the record skip 45 times each minute. What is the linear speed of the scratch as it turns? 10.2 Rotational Speed (sometimes called angular speed) is the number of rotations per unit of time. All parts of the rigid turntable rotate about the axis in the same amount of time. All parts have the same, or the same number of rotations per unit of time. It is common to express rotational speed in revolutions per minute (RPM). 3
4 10.2 Rotational Speed All parts of the turntable rotate at the same speed. a. A point farther away from the travels a longer path in the same time and therefore has a greater speed. b. A ladybug sitting twice as far from the center moves as fast Rotational Speed Tangential and Rotational Speed Tangential speed and rotational speed are related. Tangential speed is directly proportional to the rotational speed and the radial distance from the axis of rotation. Tangential speed ~ - In symbol form, v ~ r You move if the rate of rotation increases (bigger ). You also move if you are farther from the axis (bigger r). 4
5 10.2 Rotational Speed think! At an amusement park, you and a friend sit on a large rotating disk. You sit at the edge and have a rotational speed of 4 RPM and a linear speed of 6 m/s. Your friend sits halfway to the center. What is her rotational speed? What is her linear speed? 10.3 Centripetal Force The centripetal force on an object depends on the object s, its, and the of its circular path. 5
6 10.3 Centripetal Force Velocity involves both speed and direction. When an object moves in a circle, even at constant speed, the object still undergoes because its direction is changing. This change in direction is due to a net force (otherwise the object would continue to go in a straight line). Any object moving in a circle undergoes an acceleration that is directed to the center of the circle a. Example 1 A 150 kg ball at the end of a string is revolving uniformly in a horizontal circle of radius m. The ball makes 2.00 revolutions in a second. a) What is the tangential speed? b) What is the centripetal acceleration? 6
7 Example 2 Missy s favorite ride at the Topsfield Fair is the rotor, which has a radius of 4.0 m. The ride takes 2.0 s to make one full revolution. a) What is Missy s linear speed on the rotor? b) What is Missy s centripetal acceleration on the rotor? 10.3 Centripetal Force means toward the center. The force directed toward a fixed center that causes an object to follow a circular path is called a centripetal force. 7
8 10.3 Centripetal Force Centripetal force is not a basic force of nature, but is the label given to that is directed toward a fixed center. If the motion is circular and executed at constant speed, this force acts at right angles (tangent) to the path of the moving object Centripetal Force holds a car in a curved path. a. For the car to go around a curve, there must be sufficient friction to provide the required centripetal force. b. If the force of friction is not great enough, skidding occurs. 8
9 10.3 Centripetal Force The clothes in a washing machine are forced into a circular path, but the water is not, and it flies off Centripetal Force Calculating Centripetal Forces Greater speed and greater mass require greater centripetal force. Traveling in a circular path with a smaller radius of curvature requires a greater centripetal force. Centripetal force, F c, is measured in newtons when m is expressed in kilograms, v in meters/second, and r in meters. 9
10 10.3 Centripetal Force 10
11 10.4 Centripetal and Centrifugal Forces The is attributed not to any real force but to inertia the tendency of the moving body to follow a straightline path. Example 1 Captain Chip, the pilot of a 60,500-kg jet plane, is told that he must remain in a holding pattern over the airport until it is his turn to land. If Captain Chip flies his plane in a circle whose radius is 50.0 km once every 30.0 min, what centripetal force must the air exert against the wings to keep the plane moving in a circle? 11
12 10.4 Centripetal and Centrifugal Forces Sometimes an outward force is also attributed to. This apparent outward force on a rotating or revolving body is called. Centrifugal means center-fleeing, or away from the center Centripetal and Centrifugal Forces When the string breaks, the whirling can moves in a straight line, tangent to not outward from the center of its. 12
13 10.4 Centripetal and Centrifugal Forces The only force that is exerted on the whirling can (neglecting gravity) is directed toward the center of circular motion. This is a force. No outward force acts on the can Centrifugal Force in a Rotating Reference Frame is an effect of rotation. It is not part of an interaction and therefore it cannot be a true force. 13
14 An object will remain in rotational equilibrium if its center of mass is above the area of support. What determines whether an object will rotate when a force acts on it? Why doesn t the Leaning Tower of Pisa rotate and topple over? What maneuvers does a falling cat make to land on its feet? This chapter is about the factors that affect 14
15 11.1 Torque To make an object turn or rotate, apply a Torque Every time you open a door, turn on a water faucet, or tighten a nut with a wrench, you exert a turning force. is produced by this turning force and tends to produce rotational acceleration. Torque is different from force. 15
16 11.1 Torque When a is applied, the lever arm is the distance between the doorknob and the edge with the hinges Torque When the force is perpendicular, the distance from the turning axis to the point of contact is called the lever arm. If the force is not at right angle to the lever arm, then only the perpendicular component of the force will contribute to the torque. 16
17 11.1 Torque Although the magnitudes of the are the same in each case, the are different Torque think! If you cannot exert enough torque to turn a stubborn bolt, would more torque be produced if you fastened a length of rope to the wrench handle as shown? 17
18 Example Torque A water faucet is turned on when a force of 2.0 N is exerted on the handle, at a distance of m from the pivot point. How much torque must be produced to turn the handle? 11.2 Balanced Torques When balanced torques act on an object, there is no change in rotation. 18
19 11.2 Balanced Torques A pair of torques can each other. Balance is achieved if the torque that tends to produce clockwise rotation by the boy equals the torque that tends to produce rotation by the girl Balanced Torques do the math! What is the weight of the block hung at the 10-cm mark? 19
20 11.2 Balanced Torques do the math! The block of unknown weight tends to rotate the system of blocks and stick counterclockwise, and the 20-N block tends to rotate the system clockwise. The system is in balance when the two torques are equal: counterclockwise torque = clockwise torque Mabel and Maude are seesawing on the school playground and decide to see if they can move to the correct location to make the seesaw balance. Mabel weighs 400. N and she sits 2.00 m from the fulcrum of the seesaw. Where should 450.-N Maude sit to balance the seesaw? 20
21 11.3 Center of Mass The center of mass of an object is the point located at the object s of mass Center of Mass A baseball thrown into the air follows a smooth parabolic path. A baseball bat thrown into the air does not follow a smooth path. The bat wobbles about a special point. This point stays on a parabolic path, even though the rest of the bat does not. The motion of the bat is the sum of two motions: a spin around this, and a through the air as if all the mass were concentrated at this point. This point, called the, is where all the mass of an object can be considered to be concentrated. 21
22 11.3 Center of Mass The centers of mass of the baseball and of the spinning baseball bat each follow parabolic paths Center of Mass Location of the Center of Mass For a symmetrical object, such as a baseball, the center of mass is at the of the object. For an irregularly shaped object, such as a baseball bat, the center of mass is toward the end. 22
23 11.3 Center of Mass The center of mass of the toy is below its geometric center Center of Gravity For everyday objects, the center of gravity is the same as the center of mass. 23
24 11.5 Torque and Center of Gravity If the center of gravity of an object is above the area of support, the object will remain upright Torque and Center of Gravity The block topples when the CG extends beyond its support base. 24
25 11.5 Torque and Center of Gravity The Rule for Toppling If the CG extends outside the area of support, an unbalanced torque exists, and the object will topple. The Leaning Tower of Pisa does not topple because its does not extend beyond its base. A vertical line below the CG falls inside the base, and so the Leaning Tower has stood for centuries. If the tower leaned far enough that the CG extended beyond the base, an unbalanced torque would topple the tower Center of Gravity of People The center of gravity of a person is not located in a fixed place, but depends on body orientation. Center of Gravity Activities 25
26 11.6 Center of Gravity of People think! When you carry a heavy load such as a pail of water with one arm, why do you tend to hold your free arm out horizontally? Rotating objects tend to keep rotating while nonrotating objects tend to remain non-rotating. 26
Physics. Chapter 8 Rotational Motion
Physics Chapter 8 Rotational Motion Circular Motion Tangential Speed The linear speed of something moving along a circular path. Symbol is the usual v and units are m/s Rotational Speed Number of revolutions
More informationCentripetal force keeps an Rotation and Revolution
Centripetal force keeps an object in circular motion. Which moves faster on a merry-go-round, a horse near the outside rail or one near the inside rail? While a hamster rotates its cage about an axis,
More informationCircular Motion Tangential Speed. Conceptual Physics 11 th Edition. Circular Motion Rotational Speed. Circular Motion
Conceptual Physics 11 th Edition Circular Motion Tangential Speed The distance traveled by a point on the rotating object divided by the time taken to travel that distance is called its tangential speed
More informationChapter 8: Rotational Motion
Lecture Outline Chapter 8: Rotational Motion This lecture will help you understand: Circular Motion Rotational Inertia Torque Center of Mass and Center of Gravity Centripetal Force Centrifugal Force Rotating
More informationCircular Motion. Conceptual Physics 11 th Edition. Circular Motion Tangential Speed
Conceptual Physics 11 th Edition Circular Motion Rotational Inertia Torque Center of Mass and Center of Gravity Centripetal Force Centrifugal Force Chapter 8: ROTATION Rotating Reference Frames Simulated
More informationAngular Motion Unit Exam Practice
Angular Motion Unit Exam Practice Multiple Choice. Identify the choice that best completes the statement or answers the question. 1. If you whirl a tin can on the end of a string and the string suddenly
More informationVocabulary. Centripetal Force. Centripetal Acceleration. Rotate. Revolve. Linear Speed. Angular Speed. Center of Gravity. 1 Page
Vocabulary Term Centripetal Force Definition Centripetal Acceleration Rotate Revolve Linear Speed Angular Speed Center of Gravity 1 Page Force Relationships 1. FORCE AND MASS a. An object swung in a uniform
More informationRecap I. Angular position: Angular displacement: s. Angular velocity: Angular Acceleration:
Recap I Angular position: Angular displacement: s Angular velocity: Angular Acceleration: Every point on a rotating rigid object has the same angular, but not the same linear motion! Recap II Circular
More informationCenter of Mass. A baseball thrown into the air follows a smooth parabolic path. A baseball bat thrown into the air does not follow a smooth path.
Center of Mass A baseball thrown into the air follows a smooth parabolic path. A baseball bat thrown into the air does not follow a smooth path. The bat wobbles about a special point. This point stays
More informationChapter 8 - Rotational Dynamics and Equilibrium REVIEW
Pagpalain ka! (Good luck, in Filipino) Date Chapter 8 - Rotational Dynamics and Equilibrium REVIEW TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 1) When a rigid body
More informationAP Physics 1 Lesson 9 Homework Outcomes. Name
AP Physics 1 Lesson 9 Homework Outcomes Name Date 1. Define uniform circular motion. 2. Determine the tangential velocity of an object moving with uniform circular motion. 3. Determine the centripetal
More informationChapter 8 Rotational Motion and Equilibrium. 1. Give explanation of torque in own words after doing balance-the-torques lab as an inquiry introduction
Chapter 8 Rotational Motion and Equilibrium Name 1. Give explanation of torque in own words after doing balance-the-torques lab as an inquiry introduction 1. The distance between a turning axis and the
More informationP12 Torque Notes.notebook. March 26, Torques
Torques The size of a torque depends on two things: 1. The size of the force being applied (a larger force will have a greater effect) 2. The distance away from the pivot point (the further away from this
More informationLecture Presentation Chapter 7 Rotational Motion
Lecture Presentation Chapter 7 Rotational Motion Suggested Videos for Chapter 7 Prelecture Videos Describing Rotational Motion Moment of Inertia and Center of Gravity Newton s Second Law for Rotation Class
More informationName Period Date A) B) C) D)
Example Problems 9.2 E1. A car rounds a curve of constant radius at a constant speed. Which diagram best represents the directions of both the car s velocity and acceleration? Explain: A) B) C) D) E2.
More informationProficient. a. The gravitational field caused by a. The student is able to approximate a numerical value of the
Unit 6. Circular Motion and Gravitation Name: I have not failed. I've just found 10,000 ways that won't work.-- Thomas Edison Big Idea 1: Objects and systems have properties such as mass and charge. Systems
More informationToday. Ch. 8 on Rotation. Note, all lectures and pre-lectures posted up as always at
Ch. 8 on Rotation Today Note, all lectures and pre-lectures posted up as always at http://www.hunter.cuny.edu/physics/courses/physics100/spring-2016 Looking ahead: Sep 27, Review (Chs 2,3,4,5,6,7,8) Sep
More informationPSI AP Physics I Rotational Motion
PSI AP Physics I Rotational Motion Multiple-Choice questions 1. Which of the following is the unit for angular displacement? A. meters B. seconds C. radians D. radians per second 2. An object moves from
More informationLecture 3. Rotational motion and Oscillation 06 September 2018
Lecture 3. Rotational motion and Oscillation 06 September 2018 Wannapong Triampo, Ph.D. Angular Position, Velocity and Acceleration: Life Science applications Recall last t ime. Rigid Body - An object
More informationPSI AP Physics I Rotational Motion
PSI AP Physics I Rotational Motion Multiple-Choice questions 1. Which of the following is the unit for angular displacement? A. meters B. seconds C. radians D. radians per second 2. An object moves from
More informationIn the absence of an external force, the momentum of an object remains unchanged conservation of momentum. In this. rotating objects tend to
Rotating objects tend to keep rotating while non- rotating objects tend to remain non-rotating. In the absence of an external force, the momentum of an object remains unchanged conservation of momentum.
More informationChapter 9-10 Test Review
Chapter 9-10 Test Review Chapter Summary 9.2. The Second Condition for Equilibrium Explain torque and the factors on which it depends. Describe the role of torque in rotational mechanics. 10.1. Angular
More informationChapter 9 Rotational Dynamics
Chapter 9 ROTATIONAL DYNAMICS PREVIEW A force acting at a perpendicular distance from a rotation point, such as pushing a doorknob and causing the door to rotate on its hinges, produces a torque. If the
More informationBig Idea 4: Interactions between systems can result in changes in those systems. Essential Knowledge 4.D.1: Torque, angular velocity, angular
Unit 7: Rotational Motion (angular kinematics, dynamics, momentum & energy) Name: Big Idea 3: The interactions of an object with other objects can be described by forces. Essential Knowledge 3.F.1: Only
More informationChapter 9. Rotational Dynamics
Chapter 9 Rotational Dynamics In pure translational motion, all points on an object travel on parallel paths. The most general motion is a combination of translation and rotation. 1) Torque Produces angular
More informationName Date Period PROBLEM SET: ROTATIONAL DYNAMICS
Accelerated Physics Rotational Dynamics Problem Set Page 1 of 5 Name Date Period PROBLEM SET: ROTATIONAL DYNAMICS Directions: Show all work on a separate piece of paper. Box your final answer. Don t forget
More informationName St. Mary's HS AP Physics Circular Motion HW
Name St. Mary's HS AP Physics Circular Motion HW Base your answers to questions 1 and 2 on the following situation. An object weighing 10 N swings at the end of a rope that is 0.72 m long as a simple pendulum.
More informationPreview. Circular Motion and Gravitation Section 1. Section 1 Circular Motion. Section 2 Newton s Law of Universal Gravitation
Circular Motion and Gravitation Section 1 Preview Section 1 Circular Motion Section 2 Newton s Law of Universal Gravitation Section 3 Motion in Space Section 4 Torque and Simple Machines Circular Motion
More informationChapter 8 Rotational Motion
Chapter 8 Rotational Motion Chapter 8 Rotational Motion In this chapter you will: Learn how to describe and measure rotational motion. Learn how torque changes rotational velocity. Explore factors that
More information5. A car moves with a constant speed in a clockwise direction around a circular path of radius r, as represented in the diagram above.
1. The magnitude of the gravitational force between two objects is 20. Newtons. If the mass of each object were doubled, the magnitude of the gravitational force between the objects would be A) 5.0 N B)
More informationAssignment - Periodic Motion. Reading: Giancoli, Chapter 5 Holt, Chapter 7. Objectives/HW:
Assignment - Periodic Motion Reading: Giancoli, Chapter 5 Holt, Chapter 7 Objectives/HW: The student will be able to: 1 Define and calculate period and frequency. 2 Apply the concepts of position, distance,
More informationWe define angular displacement, θ, and angular velocity, ω. What's a radian?
We define angular displacement, θ, and angular velocity, ω Units: θ = rad ω = rad/s What's a radian? Radian is the ratio between the length of an arc and its radius note: counterclockwise is + clockwise
More informationCircular Motion.
1 Circular Motion www.njctl.org 2 Topics of Uniform Circular Motion (UCM) Kinematics of UCM Click on the topic to go to that section Period, Frequency, and Rotational Velocity Dynamics of UCM Vertical
More informationAP Physics 1 Rotational Motion Practice Test
AP Physics 1 Rotational Motion Practice Test MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) A spinning ice skater on extremely smooth ice is able
More informationB) v `2. C) `2v. D) 2v. E) 4v. A) 2p 25. B) p C) 2p. D) 4p. E) 4p 2 25
1. 3. A ball attached to a string is whirled around a horizontal circle of radius r with a tangential velocity v. If the radius is changed to 2r and the magnitude of the centripetal force is doubled the
More informationUNIT HW ROTATION ANSWER KEY
Conceptual Questions UNIT HW ROTATION ANSWER KEY 1) D_What type of linear acceleration does an object moving with constant linear speed (st) in a circular path experience? A) free fall C) linear acceleration
More informationCutnell/Johnson Physics
Cutnell/Johnson Physics Classroom Response System Questions Chapter 5 Dynamics of Uniform Circular Motion Interactive Lecture Questions 5.1.1. An airplane flying at 115 m/s due east makes a gradual turn
More informationPreview. Circular Motion and Gravitation Section 1. Section 1 Circular Motion. Section 2 Newton s Law of Universal Gravitation
Circular Motion and Gravitation Section 1 Preview Section 1 Circular Motion Section 2 Newton s Law of Universal Gravitation Section 3 Motion in Space Section 4 Torque and Simple Machines Circular Motion
More informationChapter 7 & 8 Prep Test: Circular Motion and Gravitation
Chapter 7 & 8 Prep Test: Circular Motion and Gravitation Multiple Choice Identify the choice that best completes the statement or answers the question. A monkey rides a tricycle in a circular path with
More informationChapter 8 Rotational Motion and Equilibrium
Chapter 8 Rotational Motion and Equilibrium 8.1 Rigid Bodies, Translations, and Rotations A rigid body is an object or a system of particles in which the distances between particles are fixed (remain constant).
More informationPage 1. Name:
Name: 3834-1 - Page 1 1) If a woman runs 100 meters north and then 70 meters south, her total displacement is A) 170 m south B) 170 m north C) 30 m south D) 30 m north 2) The graph below represents the
More informationPhysics 130: Questions to study for midterm #1 from Chapter 8
Physics 130: Questions to study for midterm #1 from Chapter 8 1. If the beaters on a mixer make 800 revolutions in 5 minutes, what is the average rotational speed of the beaters? a. 2.67 rev/min b. 16.8
More informationSlide 1 / 133. Slide 2 / 133. Slide 3 / How many radians are subtended by a 0.10 m arc of a circle of radius 0.40 m?
1 How many radians are subtended by a 0.10 m arc of a circle of radius 0.40 m? Slide 1 / 133 2 How many degrees are subtended by a 0.10 m arc of a circle of radius of 0.40 m? Slide 2 / 133 3 A ball rotates
More informationSlide 2 / 133. Slide 1 / 133. Slide 3 / 133. Slide 4 / 133. Slide 5 / 133. Slide 6 / 133
Slide 1 / 133 1 How many radians are subtended by a 0.10 m arc of a circle of radius 0.40 m? Slide 2 / 133 2 How many degrees are subtended by a 0.10 m arc of a circle of radius of 0.40 m? Slide 3 / 133
More informationProjectile and Circular Motion Review Packet
Conceptual Physics Projectile and Circular Motion Review Packet Mr. Zimmerman Textbook Reference: pp. 33-42, 122-135 Key Terms (fill in definitions) projectile - any object that moves through the air or
More informationMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Horses with the greatest linear speed on a merry-go-round are located 1) A) near the
More informationUniform Circular Motion
Uniform Circular Motion Motion in a circle at constant angular speed. ω: angular velocity (rad/s) Rotation Angle The rotation angle is the ratio of arc length to radius of curvature. For a given angle,
More informationC) D) 2. The diagram below shows a worker using a rope to pull a cart.
1. Which graph best represents the relationship between the acceleration of an object falling freely near the surface of Earth and the time that it falls? 2. The diagram below shows a worker using a rope
More informationCircular Motion CENTRIPETAL ACCELERATION. tf-t,
Circular Motion Ill SECTION OBJECTIVES Solve problems involving centripetal acceleration. Solve problems involving centripetal force. Explain how the apparent existence of an outward force in circular
More informationCenter of Mass / Torque
Center of Mass / Torque Level : Physics I Teacher : Kim 1. Center of Mass( or Center of Gravity or Center of Weight) - The center of mass(com) of an object is the point located at the object s average
More informationChapter 9. Rotational Dynamics
Chapter 9 Rotational Dynamics In pure translational motion, all points on an object travel on parallel paths. The most general motion is a combination of translation and rotation. 1) Torque Produces angular
More informationCircular Motion. 2 types of Acceleration. Centripetal Force and Acceleration. In a circle. Constant Velocity vs. Constant Speed.
Circular Motion What does it mean to accelerate Centripetal Force and Acceleration Constant Velocity vs. Constant Speed. 2 types of Acceleration In a circle Direction of acceleration / velocity top view
More informationChapter 5 The Force Vector
Conceptual Physics/ PEP Name: Date: Chapter 5 The Force Vector Section Review 5.1 1. Indicate whether each of the following units of measurement are scalar or vector units: Speed _scalar time scalar mass
More informationChapter 9 TORQUE & Rotational Kinematics
Chapter 9 TORQUE & Rotational Kinematics This motionless person is in static equilibrium. The forces acting on him add up to zero. Both forces are vertical in this case. This car is in dynamic equilibrium
More informationPhysics Midterm Review Sheet
Practice Problems Physics Midterm Review Sheet 2012 2013 Aswers 1 Speed is: a a measure of how fast something is moving b the distance covered per unit time c always measured in units of distance divided
More informationLecture 6. Circular Motion. Pre-reading: KJF 6.1 and 6.2. Please take a clicker CIRCULAR MOTION KJF
Lecture 6 Circular Motion Pre-reading: KJF 6.1 and 6.2 Please take a clicker CIRCULAR MOTION KJF 6.1 6.4 Angular position If an object moves in a circle of radius r, then after travelling a distance s
More informationNAME. (2) Choose the graph below that represents the velocity vs. time for constant, nonzero acceleration in one dimension.
(1) The figure shows a lever (which is a uniform bar, length d and mass M), hinged at the bottom and supported steadily by a rope. The rope is attached a distance d/4 from the hinge. The two angles are
More informationTest 7 wersja angielska
Test 7 wersja angielska 7.1A One revolution is the same as: A) 1 rad B) 57 rad C) π/2 rad D) π rad E) 2π rad 7.2A. If a wheel turns with constant angular speed then: A) each point on its rim moves with
More informationSection 9.2. Centripetal Acceleration Centripetal Force
Section 9.2 Centripetal Acceleration Centripetal Force Centripetal Acceleration Uniform Circular Motion The motion of an object in a circular path at a constant speed is known as uniform circular motion
More information= o + t = ot + ½ t 2 = o + 2
Chapters 8-9 Rotational Kinematics and Dynamics Rotational motion Rotational motion refers to the motion of an object or system that spins about an axis. The axis of rotation is the line about which the
More information1. An object is fired with an initial velocity of 23 m/s [R30 U]. What are the initial components of its velocity?
Physics 304 Unit 1 - Total Review 1. An object is fired with an initial velocity of 3 m/s [R30U]. What are the initial components of its velocity?. An object rolls off the top of a horizontal table. a)
More informationa reference frame that accelerates in a straight line a reference frame that moves along a circular path Straight Line Accelerated Motion
1.12.1 Introduction Go back to lesson 9 and provide bullet #3 In today s lesson we will consider two examples of non-inertial reference frames: a reference frame that accelerates in a straight line a reference
More informationTorque rotational force which causes a change in rotational motion. This force is defined by linear force multiplied by a radius.
Warm up A remote-controlled car's wheel accelerates at 22.4 rad/s 2. If the wheel begins with an angular speed of 10.8 rad/s, what is the wheel's angular speed after exactly three full turns? AP Physics
More informationUse the following to answer question 1:
Use the following to answer question 1: On an amusement park ride, passengers are seated in a horizontal circle of radius 7.5 m. The seats begin from rest and are uniformly accelerated for 21 seconds to
More informationUCM-Circular Motion. Base your answers to questions 1 and 2 on the information and diagram below.
Base your answers to questions 1 and 2 on the information and diagram The diagram shows the top view of a 65-kilogram student at point A on an amusement park ride. The ride spins the student in a horizontal
More informationExam 3 PREP Chapters 6, 7, 8
PHY241 - General Physics I Dr. Carlson, Fall 2013 Prep Exam 3 PREP Chapters 6, 7, 8 Name TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 1) Astronauts in orbiting satellites
More informationTorque. Physics 6A. Prepared by Vince Zaccone For Campus Learning Assistance Services at UCSB
Physics 6A Torque is what causes angular acceleration (just like a force causes linear acceleration) Torque is what causes angular acceleration (just like a force causes linear acceleration) For a torque
More information7 Rotational Motion Pearson Education, Inc. Slide 7-2
7 Rotational Motion Slide 7-2 Slide 7-3 Recall from Chapter 6 Angular displacement = θ θ= ω t Angular Velocity = ω (Greek: Omega) ω = 2 π f and ω = θ/ t All points on a rotating object rotate through the
More informationCHAPTER 8 TEST REVIEW MARKSCHEME
AP PHYSICS Name: Period: Date: 50 Multiple Choice 45 Single Response 5 Multi-Response Free Response 3 Short Free Response 2 Long Free Response MULTIPLE CHOICE DEVIL PHYSICS BADDEST CLASS ON CAMPUS AP EXAM
More informationScience Olympiad. Machines. Roger Demos
Science Olympiad Machines. Roger Demos Some Basic Physics Concepts What do Machines do? Do they allow one to do more work? Not really, at best they make completing a task easier. So then what do Machines
More informationCircular Motion. For You To Do
Activity 9 Circular Motion Activity 9 Circular Motion GOALS In this activity you will: Understand that a centripetal force is required to keep a mass moving in a circular path at constant speed. Understand
More informationGeneral Physics (PHY 2130)
General Physics (PHY 130) Lecture 0 Rotational dynamics equilibrium nd Newton s Law for rotational motion rolling Exam II review http://www.physics.wayne.edu/~apetrov/phy130/ Lightning Review Last lecture:
More informationCircular motion, Center of Gravity, and Rotational Mechanics
Circular motion, Center of Gravity, and Rotational Mechanics Rotation and Revolution Every object moving in a circle turns around an axis. If the axis is internal to the object (inside) then it is called
More informationQuest Chapter 09. Eliminate the obviously wrong answers. Consider what is changing: speed, velocity, some part of velocity? Choose carefully.
1 A dragster maintains a speedometer reading of 100 km/h and passes through a curve with a constant radius. Which statement is true? 1. The dragster rounded the curve at a changing speed of 100 km/h. 2.
More informationChapter 11 Rotational Dynamics and Static Equilibrium. Copyright 2010 Pearson Education, Inc.
Chapter 11 Rotational Dynamics and Static Equilibrium Units of Chapter 11 Torque Torque and Angular Acceleration Zero Torque and Static Equilibrium Center of Mass and Balance Dynamic Applications of Torque
More informationChapter 6: Systems in Motion
Chapter 6: Systems in Motion The celestial order and the beauty of the universe compel me to admit that there is some excellent and eternal Being, who deserves the respect and homage of men Cicero (106
More informationSection Centripetal Acceleration Centripetal Force
Section 10.2 Centripetal Acceleration Centripetal Force Centripetal Acceleration Uniform Circular Motion The motion of an object in a circular path at a constant speed is known as uniform circular motion
More informationChapter 8 Lecture Notes
Chapter 8 Lecture Notes Physics 2414 - Strauss Formulas: v = l / t = r θ / t = rω a T = v / t = r ω / t =rα a C = v 2 /r = ω 2 r ω = ω 0 + αt θ = ω 0 t +(1/2)αt 2 θ = (1/2)(ω 0 +ω)t ω 2 = ω 0 2 +2αθ τ
More informationReview - Chapter 1. Ans: 2.12m
Review - Chapter 1 The distance d that a certain particle moves may be calculated from the expression d = at + bt 2 where a and b are constants; and t is the elapsed time. The dimensions of the quantities
More informationMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) You are standing in a moving bus, facing forward, and you suddenly fall forward as the
More informationRotational Motion. Chapter 8: Rotational Motion. Angular Position. Rotational Motion. Ranking: Rolling Cups 9/21/12
Rotational Motion Chapter 8: Rotational Motion In physics we distinguish two types of motion for objects: Translational Motion (change of location): Whole object moves through space. Rotational Motion
More information1. In which situation is an object undergoing centripetal acceleration? (C) a car accelerating on a drag strip (D) a hockey puck gliding on ice
Physics 3204 Assignment 2.1 UCM DUE: Thursday Nov 24, 2017 Name: Part A. Multiple Choice: Select the best possible answer. Place the answer on the answer sheet. 1. In which situation is an object undergoing
More informationPhysics 8 Friday, October 20, 2017
Physics 8 Friday, October 20, 2017 HW06 is due Monday (instead of today), since we still have some rotation ideas to cover in class. Pick up the HW07 handout (due next Friday). It is mainly rotation, plus
More informationCircular Motion 8.01 W04D1
Circular Motion 8.01 W04D1 Next Reading Assignment: W04D2 Young and Freedman: 3.4; 5.4-5.5 Experiment 2: Circular Motion 2 Concept Question: Coastal Highway A sports car drives along the coastal highway
More informationRotational Mechanics Part III Dynamics. Pre AP Physics
Rotational Mechanics Part III Dynamics Pre AP Physics We have so far discussed rotational kinematics the description of rotational motion in terms of angle, angular velocity and angular acceleration and
More informationMoment of Inertia Race
Review Two points, A and B, are on a disk that rotates with a uniform speed about an axis. Point A is closer to the axis than point B. Which of the following is NOT true? 1. Point B has the greater tangential
More informationChapter 6 Motion in Two Dimensions
Conceptual Physics/ PEP Name: Date: Chapter 6 Motion in Two Dimensions Section Review 6.1 1. What is the word for the horizontal distance a projectile travels? 2. What does it mean to say a projectile
More informationPage 2. Q1.A satellite X is in a circular orbit of radius r about the centre of a spherical planet of mass
Q1. satellite X is in a circular orbit of radius r about the centre of a spherical planet of mass M. Which line, to, in the table gives correct expressions for the centripetal acceleration a and the speed
More informationROTATIONAL DYNAMICS AND STATIC EQUILIBRIUM
ROTATIONAL DYNAMICS AND STATIC EQUILIBRIUM Chapter 11 Units of Chapter 11 Torque Torque and Angular Acceleration Zero Torque and Static Equilibrium Center of Mass and Balance Dynamic Applications of Torque
More informationChapter 7. Preview. Objectives Tangential Speed Centripetal Acceleration Centripetal Force Describing a Rotating System. Section 1 Circular Motion
Section 1 Circular Motion Preview Objectives Tangential Speed Centripetal Acceleration Centripetal Force Describing a Rotating System Section 1 Circular Motion Objectives Solve problems involving centripetal
More informationTeach Yourself AP Physics in 24 Hours. and Equilibrium. Physics Rapid Learning Series
Rapid Learning Center Chemistry :: Biology :: Physics :: Math Rapid Learning Center Presents Teach Yourself AP Physics in 4 Hours 1/53 *AP is a registered trademark of the College Board, which does not
More information1. A baseball player throws a ball horizontally. Which statement best describes the ball's motion after it is thrown? [Neglect the effect of
1. A baseball player throws a ball horizontally. Which statement best describes the ball's motion after it is thrown? [Neglect the effect of friction.] A) Its vertical speed remains the same, and its horizontal
More informationPeriod: Date: Review - UCM & Energy. Page 1. Base your answers to questions 1 and 2 on the information and diagram below.
Base your answers to questions 1 and 2 on the information and diagram below. The diagram shows the top view of a -kilogram student at point A on an amusement park ride. The ride spins the student in a
More informationSPH 4C Unit 2 Mechanical Systems
SPH 4C Unit 2 Mechanical Systems Forces and Free Body Diagrams Learning Goal: I can consistently identify and draw Free Body Diagrams for given real world situations. There are 4 fundamental forces Gravity
More informationChapter 8, Rotational Equilibrium and Rotational Dynamics. 3. If a net torque is applied to an object, that object will experience:
CHAPTER 8 3. If a net torque is applied to an object, that object will experience: a. a constant angular speed b. an angular acceleration c. a constant moment of inertia d. an increasing moment of inertia
More informationPractice. Newton s 3 Laws of Motion. Recall. Forces a push or pull acting on an object; a vector quantity measured in Newtons (kg m/s²)
Practice A car starts from rest and travels upwards along a straight road inclined at an angle of 5 from the horizontal. The length of the road is 450 m and the mass of the car is 800 kg. The speed of
More informationUpon collision, the clay and steel block stick together and move to the right with a speed of
1. A 2.0-kilogram ball traveling north at 4.0 meters per second collides head on with a 1.0-kilogram ball traveling south at 8.0 meters per second. What is the magnitude of the total momentum of the two
More informationChapter 7 Rotational Motion 7.1 Angular Quantities Homework # 51
7.1 Angular Quantities Homework # 51 01. Convert the following angle measurements to radians. a.) 30.0 b.) 45.0 c.) 90.0 02. The Empire State Building has a total height of 443.2 m (including the lightning
More informationA) more mass and more inertia C) the same as the magnitude of the rock's weight C) a man standing still on a bathroom scale
1. A 15-kilogram cart is at rest on a horizontal surface. A 5-kilogram box is placed in the cart. Compared to the mass and inertia of the cart, the cart-box system has A) more mass and more inertia B)
More informationLecture Outline Chapter 11. Physics, 4 th Edition James S. Walker. Copyright 2010 Pearson Education, Inc.
Lecture Outline Chapter 11 Physics, 4 th Edition James S. Walker Chapter 11 Rotational Dynamics and Static Equilibrium Units of Chapter 11 Torque Torque and Angular Acceleration Zero Torque and Static
More information