Chapter 8 Rotational Motion and Equilibrium. 1. Give explanation of torque in own words after doing balance-the-torques lab as an inquiry introduction
|
|
- Daisy Edwards
- 6 years ago
- Views:
Transcription
1 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 point of contact of a perpendicular force is called the fulcrum. a. T b. F False: it is the moment arm 2. To turn a stubborn screw, it is best to use a screwdriver that has a a. long handle b. wide handle c. yellow handle d. red handle B Wide handle with same force gives greater torque 2. Locate center of mass of an object, showing force acting via free-body diagram 3. The center of mass of an object is always located at the object s geometric center. a. T b. F False it depends on where the weight is distributed. 4. The long heavy tail of a spider monkey enables the monkey to easily vary its. a. weight b. momentum c. center of gravity d. none of these C by moving the tail towards and away from body or up or down. 5. When a wrench is slid spinning over a frictionless tabletop, its center of gravity follows a. a wobbly path with irregular speed. b. a regular straight-line path. c. a straight-line path with irregular speed B See diagram in the book. 6. The center of gravity of an object can be located by. a. looking at the intersection of lines drawn from suspension points. b. balancing it above your finger. c. drawing lines down from suspension points. d. all of the above will work D See section 8.3 in text book.
2 7. An object thrown into the air rotates about its. a. midpoint. b. center of gravity. c. geometric center. d. edge. e. none B see text 8. A ball resting on the floor is in what kind of equilibrium? a. Neutral b. Stable c. Unstable B stable. See the book p Determine whether an object will tip over based on locations of axis of rotation and center of mass 10. An unaided object will topple over when its center of gravity extends beyond its support base. a. T b. F True: see lab and book 11. When you carry a heavy load with one arm like a bucket full of water, why do you tend to hold your free arm away from your body? a. to change the center of gravity of your body and the load b. to change the mass of your body c. to look way sweet d. to change how much weight you and your load has A see lab 12. If an object is in stable equilibrium, any displacement will. a. decrease its mass. b. lower its center of gravity. c. raise its center of gravity. d. increase its mass. e. neither raise nor lower its center of gravity. c See book.
3 4. Calculate torque, include situations where force is not perpendicular to radius 15. You exert 300 Newtons of force on your bike pedal at an angle of 60 degrees. The length from the axis of rotation on the wheel to the pedal is 20 centimeters. What torque do you apply to the bike wheel? a N m b. 60 N m c N m θ d N m A- rf(sinө) Calculate missing torque needed to establish equilibrium 17. Two people sit on a balanced see-totter. When one person leans toward the center of the teetersaw, that person s end of the see-totter will a. fall b. rise c. stay at the same level B moment arm decreases 18. A 400-gram mass is attached to the 20-cm position on a meter stick that is suspended from a hanging string at the 50-cm position. If a mass of 600-grams is attached to the second side of the suspended stick, at what METER STICK POSITION should you attach the 600-gram mass? a. 90 cm b. 80 cm c. 70 cm d. 50 cm e. 20 cm C-Use torques.
4 20. Your physics teacher has a mass of 80-kg while holding his calculator, 3-ring binder, pens, and grade book. He is forced to walk the plank by his unruly classes the plank is 4.0-meters long and sits atop the lab bench. The 4.0-meter long plank has 0.5-meters extending past the bench and 3.5- meters still above the bench. While standing at the very end of the plank your teacher just balances. What is the mass of the plank? a kg b kg c kg d. 20 kg e. 10 kg C-26.7kg or 261N 5. Determine arc length, angular velocity, and angular acceleration. 22. The rotational velocity of a 45 rev/min record in radians/sec is approximately: a. 45 rad/sec b. 283 rad/sec c rad/sec d. 4.7 rad/sec e rad/sec D -4.7rad/sec 24. The armature of a motor is accelerated uniformly from rest to a rotational velocity of 1800 rev/min in 10.0 seconds time. The rotational acceleration of the motor is: a. 180 rad/sec 2 b. 90 rad/sec 2 c rad/sec 2 d rad/sec 2 D-18.8rad/s 2
5 6. Demonstrate conceptual knowledge of moment of inertia and how it is affected by changing mass distribution 27. When a gymnast moves from an extended position to a tucked position, she. a. decreases her moment of inertia b. increases her moment of inertia c. neither a or b A-r decreases m stays the same. 28. A short pendulum has a larger moment of inertia than a long pendulum of the same mass. a. T b. F False-a smaller one m is the same r is less. 29. Dancers may change their moment of inertia while going through a break-dance routine. a. T b. F True: change r for arms and legs. 1) The condition for rolling without slipping is that the center of mass speed is 2 A) vcm = rω B) vcm = 2rω rω C) vcm = 2 D) vcm = rω 2 E) = r ω vcm Answer: D 3) A 50. cm diameter wheel is rotating initially at 2.0 revolutions per second. It slows down uniformly and comes to rest in 15.seconds. (a) What was its angular acceleration? Answer: (a) rev/s 2 ; rad/s 2 Diff: 3
6 4) A wheel of diameter 0.70m rolls without slipping. A point at the top of the wheel moves with a tangential speed 2.0 m/s. (b) What is the angular speed of the wheel? Answer: (b) 5.8 rad/s Diff:3 5) A pencil balanced on its tip such that it does not move A) is in unstable equilibrium. B) has a net torque acting on it. C) has a net vertical force. D) has a zero moment of inertia. Answer: A 6) A wheel slows down uniformly and comes to rest in 15. seconds. It is rotating initially at 2.0 revolutions per second and has a diameter of 50.cm. (b) What was the tangential acceleration? Answer: (b) m/s 2 Diff: 3 7) A cylinder, of radius 8.0 cm, rolls 20.cm in 5.0s. (a) Through what angular displacement does the cylinder move in this time? (b) What is the angular speed? Answer: (a) 2.5 radians (143 ) (b) 0.50 rad/sec 8) A bicycle is moving 4.0 m/s. What is the angular speed of a wheel if its radius is 30.cm? A) 4.8 rad/s B) 7.6 rad/s C) 0.36 rad/s D) 1.2 rad/s E) 13. rad/s Answer: E Diff:2
7 1) What condition or conditions is/are necessary for rotational equilibrium? A) F = 0 y x B) F = 0, F = 0 C) τ = 0 D) F = 0 x x y E) F = 0, F = 0, τ = 0 y Answer: C 2) A girl weighing 450. N sits on one end of a seesaw that is 3.0 m long and is pivoted 1.3m from the child. If the seesaw is just balanced when a boy sits at the opposite end, what is his weight? Neglect the weight of the seesaw. Answer: 344. newtons Diff:2 5) Five forces act on a massless rod free to pivot at point P. Which force is producing a counter-clockwise (out of the paper) torque about point P? A) A B) B C) C D) D E) E Answer: C
8 9) A boy and a girl are balanced on a massless seesaw. The boy has a mass of 60 kg and the girl's mass is 50 kg. If the boy sits 1.5m from the pivot point on one side of the seesaw, where must the girl sit on the other side for equilibrium? A) 3.0 m B) 1.3m C) 2.5 m D) 1.8m Answer: D 6) A uniform rod has a weight of 40.N and a length of 1.0m. It is hinged to a wall (at the left end), and held in a horizontal position by a vertical massless string (at the right end). What is the magnitude of the torque exerted by the string about a horizontal axis which passes through the hinge and is perpendicular to the rod? A) 40 N-m B) 10 N-m C) 5.0 N-m D) 20 N-m E) 30 N-m Answer: D 8) What condition or conditions is/ are necessary for static equilibrium? A) F = 0 y x B) F = 0, F = 0 C) τ = 0 D) F = 0 x x y E) F = 0, F = 0, τ = 0 y Answer: E Diff:2
9 10) A heavy boy and a lightweight girl are balanced on a massless seesaw. If they both move forward so that they are one-half their original distance from the pivot point, what will happen to the seesaw? A) It is impossible to say without knowing the masses and the distances. B) The side the boy is sitting on will lilt downward. C) Nothing, the seesaw will still be balanced. D) The side the girl is silting on will lilt downward. Answer: C 11) "Lever Arm" can have which of the following units? (a) Joules (b) N.m2 (c) kg.m 2 /s (d) kg.m / s2 (e) meters Answer: (e) meters 13) A force is applied to the end of a 2.0m long uniform board weighing 50.N, in order to keep it horizontal, while it pushes against a wall at the left. If the angle the force makes with the board is 30 in the direction shown, what is the applied force F? A) 58.N B) 50.N C) 29.N D) 90.N E) 32.N Answer: B 8.3 Rotational Dynamics 3) Torque has which of the following units? (a) joules (b) N m (c) kg m 2 /s (d) kg m 2 /s 2 (e) kg m 2 Answer: (b) N m Diff:1
10 5) Is it easier (less torque) to swing a bat holding the handle at the end, or "choked up"? Why? Answer: "Choked up", because the moment of inertia is less about the axis of rotation (bat center of mass moved toward axis). 6) Consider a solid object which is subjected to a net torque. That object will experience which of the following? A) a linear acceleration and an angular acceleration B) an angular acceleration C) a constant angular velocity D) a changing moment of inertia Answer: B 14) An ice skater performs a pirouette (a fast spin) by pulling in his outstretched arms close to his body. What happens to his moment of inertia about the axis of rotation? A) It does not change. B) It decreases. C) It increases. D) It changes, but it is impossible to tell which way. Answer: B Diff:2 16) A solid cylinder and a hollow cylinder have the same mass and the same radius. Which statement is true concerning their moment of inertia about an axis through the exact center of the flat surfaces? A) The hollow cylinder has the greater moment of inertia. B) The solid cylinder has the greater moment of inertia. C) Both cylinders have the same moment of inertia. D) The moment of inertia cannot be determined since it depends on the amount of material removed from the inside of the hollow cylinder.. Answer: A 20) Consider two uniform solid spheres where both have the same diameter, but one has twice the mass of the other. The ratio of the larger moment of inertia to that of the smaller moment of inertia is A) 2. B) 10. C) 4. D) 8. E) 6. Answer: A Diff:2
11 23) Moment of Inertia has which of the following units? (a) joules (b) N.m (c) kg.m 2 /s (d) kg.m 2 /s 2 (e) kg.m 2 Answer: (e) kg-m 2 Difficult 4) An 82.0 kg painter stands on a long horizontal board 1.55m from one end. The 15.5 kg board is 5.50 m long. The board is supported at each end. (a) What is the total force provided by both supports? (b) With what force does the support, closest to the painter, push upward? Answer: (a) 956. N (b) 653. N Diff: 3 4) A 2.50 kg is at (r1.00, 3.00) meters. What is the moment of inertia: (a) about the x-axis? (b) about the y-axis? (c) about the line defined by x= 6.00 m? Answer: (a) 2.50 kg-m 2 (b) 22.5 kg-m 2 (c) 62.5 kg-m 2 Diff: 3
Chapter 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 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 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 informationMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Exam #3 Name 1) A 2000. kg car, traveling to the right at 30. m/s, collides with a brick wall and comes to rest in 0.20 s. 1) The average force the car exerts on the wall is A) 60. kn. B) 12. kn. C) 300
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 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 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 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 information1. Give explanation of torque in own words after doing balance-the-torqueslab as an inquiry introduction
Chapter 8 Rotational Motion and Equilibrium 1. Give explanation of torque in own words after doing balance-the-torqueslab as an inquiry introduction 1. The distance between I a turning axis and the point
More informationPhysics. 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 informationThe student will be able to: 1 Determine the torque of an applied force and solve related problems.
Honors Physics Assignment Rotational Mechanics Reading Chapters 10 and 11 Objectives/HW The student will be able to: HW: 1 Determine the torque of an applied force and solve related problems. (t = rx r
More informationPHYSICS 149: Lecture 21
PHYSICS 149: Lecture 21 Chapter 8: Torque and Angular Momentum 8.2 Torque 8.4 Equilibrium Revisited 8.8 Angular Momentum Lecture 21 Purdue University, Physics 149 1 Midterm Exam 2 Wednesday, April 6, 6:30
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 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 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 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 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 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 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 informationThe student will be able to: the torque of an applied force and solve related problems.
Honors Physics Assignment Rotational Mechanics Reading Chapters 10 and 11 Objectives/HW: Assignment #1 M: Assignment #2 M: Assignment #3 M: Assignment #4 M: 1 2 3 #1-5 #6-10 #14, 15, 17, 18, 20-23 #24,
More informationRotation Quiz II, review part A
Rotation Quiz II, review part A 1. A solid disk with a radius R rotates at a constant rate ω. Which of the following points has the greater angular velocity? A. A B. B C. C D. D E. All points have the
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 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 informationPHYSICS 221 SPRING 2013
PHYSICS 221 SPRING 2013 EXAM 2: April 4, 2013 8:15-10:15pm Name (printed): Recitation Instructor: Section # INSTRUCTIONS: This exam contains 25 multiple-choice questions plus 2 extra credit questions,
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 informationExercise Torque Magnitude Ranking Task. Part A
Exercise 10.2 Calculate the net torque about point O for the two forces applied as in the figure. The rod and both forces are in the plane of the page. Take positive torques to be counterclockwise. τ 28.0
More informationAP Physics Multiple Choice Practice Torque
AP Physics Multiple Choice Practice Torque 1. A uniform meterstick of mass 0.20 kg is pivoted at the 40 cm mark. Where should one hang a mass of 0.50 kg to balance the stick? (A) 16 cm (B) 36 cm (C) 44
More information31 ROTATIONAL KINEMATICS
31 ROTATIONAL KINEMATICS 1. Compare and contrast circular motion and rotation? Address the following Which involves an object and which involves a system? Does an object/system in circular motion have
More informationRotational Dynamics, Moment of Inertia and Angular Momentum
Rotational Dynamics, Moment of Inertia and Angular Momentum Now that we have examined rotational kinematics and torque we will look at applying the concepts of angular motion to Newton s first and second
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 information1. Which of the following is the unit for angular displacement? A. Meters B. Seconds C. Radians D. Radian per second E. Inches
AP Physics B Practice Questions: Rotational Motion Multiple-Choice Questions 1. Which of the following is the unit for angular displacement? A. Meters B. Seconds C. Radians D. Radian per second E. Inches
More information1 MR SAMPLE EXAM 3 FALL 2013
SAMPLE EXAM 3 FALL 013 1. A merry-go-round rotates from rest with an angular acceleration of 1.56 rad/s. How long does it take to rotate through the first rev? A) s B) 4 s C) 6 s D) 8 s E) 10 s. A wheel,
More informationPHYSICS 221 SPRING 2014
PHYSICS 221 SPRING 2014 EXAM 2: April 3, 2014 8:15-10:15pm Name (printed): Recitation Instructor: Section # INSTRUCTIONS: This exam contains 25 multiple-choice questions plus 2 extra credit questions,
More informationAP Physics 1: Rotational Motion & Dynamics: Problem Set
AP Physics 1: Rotational Motion & Dynamics: Problem Set I. Axis of Rotation and Angular Properties 1. How many radians are subtended by a 0.10 m arc of a circle of radius 0.40 m? 2. How many degrees are
More informationTutorBreeze.com 7. ROTATIONAL MOTION. 3. If the angular velocity of a spinning body points out of the page, then describe how is the body spinning?
1. rpm is about rad/s. 7. ROTATIONAL MOTION 2. A wheel rotates with constant angular acceleration of π rad/s 2. During the time interval from t 1 to t 2, its angular displacement is π rad. At time t 2
More informationChapter 9: Rotational Dynamics Tuesday, September 17, 2013
Chapter 9: Rotational Dynamics Tuesday, September 17, 2013 10:00 PM The fundamental idea of Newtonian dynamics is that "things happen for a reason;" to be more specific, there is no need to explain rest
More informationConcept Question: Normal Force
Concept Question: Normal Force Consider a person standing in an elevator that is accelerating upward. The upward normal force N exerted by the elevator floor on the person is 1. larger than 2. identical
More information3. If you drag a rip-cord 2.0m across a wheel and it turns 10rad, what is the radius of the wheel? a. 0.1m b. 0.2m c. 0.4m d.
1. Two spheres are rolled across the floor the same distance at the same speed. Which will have the greater angular velocity? a. the smaller sphere b. the larger sphere c. the angular velocities will be
More informationChapter 8. Rotational Equilibrium and Rotational Dynamics. 1. Torque. 2. Torque and Equilibrium. 3. Center of Mass and Center of Gravity
Chapter 8 Rotational Equilibrium and Rotational Dynamics 1. Torque 2. Torque and Equilibrium 3. Center of Mass and Center of Gravity 4. Torque and angular acceleration 5. Rotational Kinetic energy 6. Angular
More informationWebreview Torque and Rotation Practice Test
Please do not write on test. ID A Webreview - 8.2 Torque and Rotation Practice Test Multiple Choice Identify the choice that best completes the statement or answers the question. 1. A 0.30-m-radius automobile
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 informationName: Date: Period: AP Physics C Rotational Motion HO19
1.) A wheel turns with constant acceleration 0.450 rad/s 2. (9-9) Rotational Motion H19 How much time does it take to reach an angular velocity of 8.00 rad/s, starting from rest? Through how many revolutions
More informationCircular Motion, Pt 2: Angular Dynamics. Mr. Velazquez AP/Honors Physics
Circular Motion, Pt 2: Angular Dynamics Mr. Velazquez AP/Honors Physics Formulas: Angular Kinematics (θ must be in radians): s = rθ Arc Length 360 = 2π rads = 1 rev ω = θ t = v t r Angular Velocity α av
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 informationBig Ideas 3 & 5: Circular Motion and Rotation 1 AP Physics 1
Big Ideas 3 & 5: Circular Motion and Rotation 1 AP Physics 1 1. A 50-kg boy and a 40-kg girl sit on opposite ends of a 3-meter see-saw. How far from the girl should the fulcrum be placed in order for the
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 informationPHYSICS. Chapter 12 Lecture FOR SCIENTISTS AND ENGINEERS A STRATEGIC APPROACH 4/E RANDALL D. KNIGHT Pearson Education, Inc.
PHYSICS FOR SCIENTISTS AND ENGINEERS A STRATEGIC APPROACH 4/E Chapter 12 Lecture RANDALL D. KNIGHT Chapter 12 Rotation of a Rigid Body IN THIS CHAPTER, you will learn to understand and apply the physics
More information3. A bicycle tire of radius 0.33 m and a mass 1.5 kg is rotating at 98.7 rad/s. What torque is necessary to stop the tire in 2.0 s?
Practice 8A Torque 1. Find the torque produced by a 3.0 N force applied at an angle of 60.0 to a door 0.25 m from the hinge. What is the maximum torque this force could exert? 2. If the torque required
More informationChapter 9. Rotational Dynamics
Chapter 9 Rotational Dynamics 9.1 The Action of Forces and Torques on Rigid Objects In pure translational motion, all points on an object travel on parallel paths. The most general motion is a combination
More informationAP Physics 1- Torque, Rotational Inertia, and Angular Momentum Practice Problems FACT: The center of mass of a system of objects obeys Newton s second law- F = Ma cm. Usually the location of the center
More informationUnit 9 Rotational Motion & Torque
Unit 9 Rotational Motion & Torque Essential Fundamentals of Rotational Motion & Torque 1. Torque is a twisting force that produces angular motion. Early E. C.: / 1 Total HW Points Unit 9: / 30 Total Lab
More informationCentripetal force keeps an object in circular motion Rotation and Revolution
Centripetal force keeps an object in circular motion. 10.1 Rotation and Revolution Two types of circular motion are and. An is the straight line around which rotation takes place. When an object turns
More informationChapter 10: Dynamics of Rotational Motion
Chapter 10: Dynamics of Rotational Motion What causes an angular acceleration? The effectiveness of a force at causing a rotation is called torque. QuickCheck 12.5 The four forces shown have the same strength.
More informationRolling, Torque & Angular Momentum
PHYS 101 Previous Exam Problems CHAPTER 11 Rolling, Torque & Angular Momentum Rolling motion Torque Angular momentum Conservation of angular momentum 1. A uniform hoop (ring) is rolling smoothly from 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 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 informationChapter 8 Lecture. Pearson Physics. Rotational Motion and Equilibrium. Prepared by Chris Chiaverina Pearson Education, Inc.
Chapter 8 Lecture Pearson Physics Rotational Motion and Equilibrium Prepared by Chris Chiaverina Chapter Contents Describing Angular Motion Rolling Motion and the Moment of Inertia Torque Static Equilibrium
More informationEnd-of-Chapter Exercises
End-of-Chapter Exercises Exercises 1 12 are conceptual questions that are designed to see if you have understood the main concepts of the chapter. 1. Figure 11.21 shows four different cases involving a
More informationPhys 106 Practice Problems Common Quiz 1 Spring 2003
Phys 106 Practice Problems Common Quiz 1 Spring 2003 1. For a wheel spinning with constant angular acceleration on an axis through its center, the ratio of the speed of a point on the rim to the speed
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 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 informationChapter 8. Rotational Motion
Chapter 8 Rotational Motion Rotational Work and Energy W = Fs = s = rθ Frθ Consider the work done in rotating a wheel with a tangential force, F, by an angle θ. τ = Fr W =τθ Rotational Work and Energy
More informationIt will be most difficult for the ant to adhere to the wheel as it revolves past which of the four points? A) I B) II C) III D) IV
AP Physics 1 Lesson 16 Homework Newton s First and Second Law of Rotational Motion Outcomes Define rotational inertia, torque, and center of gravity. State and explain Newton s first Law of Motion as it
More informationMultiple Choice -- TEST I
Multiple Choice Test I--Classical Mechanics Multiple Choice -- TEST I 1) The position function for an oscillating body is x = 20 sin (6t - /2) At t = 0, the magnitude of the body's acceleration is: a)
More informationPS 11 GeneralPhysics I for the Life Sciences
PS 11 GeneralPhysics I for the Life Sciences ROTATIONAL MOTION D R. B E N J A M I N C H A N A S S O C I A T E P R O F E S S O R P H Y S I C S D E P A R T M E N T F E B R U A R Y 0 1 4 Questions and Problems
More informationPhysics 111. Tuesday, November 2, Rotational Dynamics Torque Angular Momentum Rotational Kinetic Energy
ics Tuesday, ember 2, 2002 Ch 11: Rotational Dynamics Torque Angular Momentum Rotational Kinetic Energy Announcements Wednesday, 8-9 pm in NSC 118/119 Sunday, 6:30-8 pm in CCLIR 468 Announcements This
More informationParallel Forces. Forces acting in the same or in opposite directions at different points on an object.
Parallel Forces Forces acting in the same or in opposite directions at different points on an object. Statics refers to the bodies in equilibrium. Equilibrium deals with the absence of a net force. When
More informationTextbook Reference: Wilson, Buffa, Lou: Chapter 8 Glencoe Physics: Chapter 8
AP Physics Rotational Motion Introduction: Which moves with greater speed on a merry-go-round - a horse near the center or one near the outside? Your answer probably depends on whether you are considering
More informationCHAPTER 8: ROTATIONAL OF RIGID BODY PHYSICS. 1. Define Torque
7 1. Define Torque 2. State the conditions for equilibrium of rigid body (Hint: 2 conditions) 3. Define angular displacement 4. Define average angular velocity 5. Define instantaneous angular velocity
More informationUNIVERSITY OF SASKATCHEWAN Department of Physics and Engineering Physics
UNIVERSITY OF SASKATCHEWAN Department of Physics and Engineering Physics Physics 111.6 MIDTERM TEST #2 November 16, 2000 Time: 90 minutes NAME: STUDENT NO.: (Last) Please Print (Given) LECTURE SECTION
More informationChapter 10. Rotation
Chapter 10 Rotation Rotation Rotational Kinematics: Angular velocity and Angular Acceleration Rotational Kinetic Energy Moment of Inertia Newton s nd Law for Rotation Applications MFMcGraw-PHY 45 Chap_10Ha-Rotation-Revised
More informationRotational Motion What is the difference between translational and rotational motion? Translational motion.
Rotational Motion 1 1. What is the difference between translational and rotational motion? Translational motion Rotational motion 2. What is a rigid object? 3. What is rotational motion? 4. Identify and
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 informationChapter 8 continued. Rotational Dynamics
Chapter 8 continued Rotational Dynamics 8.4 Rotational Work and Energy Work to accelerate a mass rotating it by angle φ F W = F(cosθ)x x = s = rφ = Frφ Fr = τ (torque) = τφ r φ s F to s θ = 0 DEFINITION
More informationPHYSICS 221, FALL 2011 EXAM #2 SOLUTIONS WEDNESDAY, NOVEMBER 2, 2011
PHYSICS 1, FALL 011 EXAM SOLUTIONS WEDNESDAY, NOVEMBER, 011 Note: The unit vectors in the +x, +y, and +z directions of a right-handed Cartesian coordinate system are î, ĵ, and ˆk, respectively. In this
More informationChapter 8 continued. Rotational Dynamics
Chapter 8 continued Rotational Dynamics 8.4 Rotational Work and Energy Work to accelerate a mass rotating it by angle φ F W = F(cosθ)x x = rφ = Frφ Fr = τ (torque) = τφ r φ s F to x θ = 0 DEFINITION OF
More information1301W.600 Lecture 16. November 6, 2017
1301W.600 Lecture 16 November 6, 2017 You are Cordially Invited to the Physics Open House Friday, November 17 th, 2017 4:30-8:00 PM Tate Hall, Room B20 Time to apply for a major? Consider Physics!! Program
More informationPhys 1401: General Physics I
1. (0 Points) What course is this? a. PHYS 1401 b. PHYS 1402 c. PHYS 2425 d. PHYS 2426 2. (0 Points) Which exam is this? a. Exam 1 b. Exam 2 c. Final Exam 3. (0 Points) What version of the exam is this?
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 informationTest Review Sheet. There will be a TEST on 4/11(Monday). The test will based on Center of Mass, Torque and 1- dimensional Momentum
Test Review Sheet There will be a TEST on 4/11(Monday). The test will based on Center of Mass, Torque and 1- dimensional Momentum True or False 1. Momentum is an object s mass times its velocity ( True
More informationWhen the applied force is not perpendicular to the crowbar, for example, the lever arm is found by drawing the perpendicular line from the fulcrum to
When the applied force is not perpendicular to the crowbar, for example, the lever arm is found by drawing the perpendicular line from the fulcrum to the line of action of the force. We call torques that
More informationChapter 6, Problem 18. Agenda. Rotational Inertia. Rotational Inertia. Calculating Moment of Inertia. Example: Hoop vs.
Agenda Today: Homework quiz, moment of inertia and torque Thursday: Statics problems revisited, rolling motion Reading: Start Chapter 8 in the reading Have to cancel office hours today: will have extra
More informationSection 2: Static Equilibrium II- Balancing Torques
Section 2: Static Equilibrium II- Balancing Torques Last Section: If (ie. Forces up = Forces down and Forces left = Forces right), then the object will have no translatory motion. In other words, the object
More informationRotation. PHYS 101 Previous Exam Problems CHAPTER
PHYS 101 Previous Exam Problems CHAPTER 10 Rotation Rotational kinematics Rotational inertia (moment of inertia) Kinetic energy Torque Newton s 2 nd law Work, power & energy conservation 1. Assume that
More informationPHYSICS - CLUTCH CH 13: ROTATIONAL EQUILIBRIUM.
!! www.clutchprep.com EXAMPLE: POSITION OF SECOND KID ON SEESAW EXAMPLE: A 4 m-long seesaw 50 kg in mass and of uniform mass distribution is pivoted on a fulcrum at its middle, as shown. Two kids sit on
More informationAP Physics QUIZ Chapters 10
Name: 1. Torque is the rotational analogue of (A) Kinetic Energy (B) Linear Momentum (C) Acceleration (D) Force (E) Mass A 5-kilogram sphere is connected to a 10-kilogram sphere by a rigid rod of negligible
More informationChapter 8. Rotational Equilibrium and Rotational Dynamics
Chapter 8 Rotational Equilibrium and Rotational Dynamics 1 Force vs. Torque Forces cause accelerations Torques cause angular accelerations Force and torque are related 2 Torque The door is free to rotate
More informationChapter 9. Rotational Dynamics
Chapter 9 Rotational Dynamics 9.1 The Action of Forces and Torques on Rigid Objects In pure translational motion, all points on an object travel on parallel paths. The most general motion is a combination
More informationUnless otherwise specified, use g = 9.80 m/s2
Phy 111 Exam 2 March 10, 2015 Name Section University ID Please fill in your computer answer sheet as follows: 1) In the NAME grid, fill in your last name, leave one blank space, then your first name.
More informationPhys 1401: General Physics I
1. (0 Points) What course is this? a. PHYS 1401 b. PHYS 1402 c. PHYS 2425 d. PHYS 2426 2. (0 Points) Which exam is this? a. Exam 1 b. Exam 2 c. Final Exam 3. (0 Points) What version of the exam is this?
More information2008 FXA THREE FORCES IN EQUILIBRIUM 1. Candidates should be able to : TRIANGLE OF FORCES RULE
THREE ORCES IN EQUILIBRIUM 1 Candidates should be able to : TRIANGLE O ORCES RULE Draw and use a triangle of forces to represent the equilibrium of three forces acting at a point in an object. State that
More informationAP practice ch 7-8 Multiple Choice
AP practice ch 7-8 Multiple Choice 1. A spool of thread has an average radius of 1.00 cm. If the spool contains 62.8 m of thread, how many turns of thread are on the spool? "Average radius" allows us to
More informationPhysics 201, Exam 3 -- Summer 2017
Physics 201, Exam 3 -- Summer 2017 Name (printed) On my honor as a Texas A&M University student, I will neither give nor receive unauthorized help on this exam. The fill-in-the-blank and multiple-choice
More informationFall 2007 RED Barcode Here Physics 105, sections 1 and 2 Please write your CID Colton
Fall 007 RED Barcode Here Physics 105, sections 1 and Exam 3 Please write your CID Colton -3669 3 hour time limit. One 3 5 handwritten note card permitted (both sides). Calculators permitted. No books.
More informationPhysics 221. Exam III Spring f S While the cylinder is rolling up, the frictional force is and the cylinder is rotating
Physics 1. Exam III Spring 003 The situation below refers to the next three questions: A solid cylinder of radius R and mass M with initial velocity v 0 rolls without slipping up the inclined plane. N
More informationTorque. Introduction. Torque. PHY torque - J. Hedberg
Torque PHY 207 - torque - J. Hedberg - 2017 1. Introduction 2. Torque 1. Lever arm changes 3. Net Torques 4. Moment of Rotational Inertia 1. Moment of Inertia for Arbitrary Shapes 2. Parallel Axis Theorem
More informationPHYSICS 221 SPRING 2015
PHYSICS 221 SPRING 2015 EXAM 2: April 2, 2015 8:15-10:15pm Name (printed): Recitation Instructor: Section # INSTRUCTIONS: This exam contains 25 multiple-choice questions plus 2 extra credit questions,
More informationUnit 4 Statics. Static Equilibrium Translational Forces Torque
Unit 4 Statics Static Equilibrium Translational Forces Torque 1 Dynamics vs Statics Dynamics: is the study of forces and motion. We study why objects move. Statics: is the study of forces and NO motion.
More informationRotational Motion Part I
AP Physics Rotational Motion Part I Introduction: Which moves with greater speed on a merry-go-round - a horse near the center or one near the outside? Your answer probably depends on whether you are considering
More information