hapter 13 Archimedes Up-thrust
|
|
- Joanna Lloyd
- 5 years ago
- Views:
Transcription
1 hapter 13 Archimedes Up-thrust In science, buoyancy is an upward force exerted by a fluid that opposes the weight of an immersed object. The buoyant force is also called Archimedes Up-thrust force. Proof about the presence of Upthrust force When a block of mass 1Kg is connected to a spring balance (dynamometer), the tension in the spring will read: T = w = mxg = 1x10 = 10 N But when is immersed in water, the dynamometer reads T = 7N Where does the remaining weight go to? The water held some of the weight of the block, so it appeared lighter than being held in air. The force exerted by water is the difference between the real and the apparent weights. F up = w real - w apparent Characteristics of this force: Point of application: center of mass Line of action: vertical Direction: upwards magnitude: F up = ρ L x V i x g (will be explained soon) w F up Archimedes principle says that when an object is immersed in a liquid the apparent loss of weight of an object is equal to the upthrust and this is also equal to the weight of the liquid displaced.
2 If you already know the density of the liquid then you can simply measure the volume of displaced water and use mass = volume x density to find its mass. This can easily be done using a measuring cylinder as shown in the above diagram. The origin of Upthrust force: In a column of fluid, pressure increases with depth as a result of the weight of the overlying fluid. Thus an object submerged in the fluid experiences greater pressure at the bottom of the column than at the top. This difference in pressure results in a net force that tends to accelerate an object upwards. As shown in the adjacent figure: P B > P A because it is found to be on larger depth than position A. The difference in pressure ΔP = P B - P A ΔP = F S = ρ Liquid x g x h F = ρ Liquid x g x ( h x S ) P A P B F up F = ρ Liquid x g x V immersed Where: F: Upthrust Force (N) ρ : the density of the liquid (kg/m 3 ) g: gravity = 10 N/kg V: the immersed volume inside the liquid (submerged) (m 3 ) The effect of density on Flotation Note that: The Archimedes Upthrust force depends on the density of the liquid and not the density of the object. If the density of the solid is less than the density of the liquid the object floats on the surface If the magnitude of F up is less than the magnitude of its real weight W the body will sink in a liquid. (F up <W) If the magnitude of F up is equal than the magnitude of its real weight W the body will be float on the surface in equilibrium. If the magnitude of F up is more than the magnitude of its real weight W the body will rise to the surface. (F up >W) Note: The densimeter can measure the density of a specific liquid. (a question will be given later)
3 Physics Worksheet QUESTION 1: Determination of the volume of a solid Consider a solid (S) of density ρ S = 1 g/cm 3. (S) is immersed in a liquid of density ρ. (S) is in equilibrium and the volume of the immersed part is Vi (adjacent figure). 1- (S) floats on the surface of a liquid. a) Name the two forces acting on (S). b) Tell, for each of the two forces, whether it is a contact force or an action from a distance force. c) Give the line of action and the direction of each of these two forces. d) Write down the vector relation between these two forces. e) Reproduce the figure and represent, without a scale, these two forces. 2- We repeat the experiment by putting (S) successively in different liquids. The adjacent graph represents the variation of Vi as a function of ρ. a) According to the graph, does the volume of the immersed part increase or decrease when the density of the liquid increases? b) For ρ = 1 g/cm 3, (S) is totally immersed in the liquid. Why? c) Deduce graphically the volume of (S). QUESTION 2: Floating Objects Is it easier to swim in the fresh water of a lake or in sea water? To answer this question, we perform the two following experiments with a solid (S) of mass m = 2 kg. Given: g =10 N/kg. A. First experiment (S) floats at the surface of the water of the lake of density 1000 kg/m What condition must the two forces acting on (S) satisfy so that it floats at the surface of water? 2. Calculate the value of the weight of (S). Deduce the value of Archimedes up thrust. 3. Calculate the volume V 1 of the immersed part of (S). B. Second experiment (S) floats at the surface of sea water of density 1040 kg/m 3 1. Archimedes up thrust remains the same. Why? 2. Calculate the volume V 2 of the immersed part of (S). C. Answer for the question Knowing that swimming is easier when the immersed volume of the floating object decreases, is it easier to swim in the fresh water of a lake or in the sea water? Why?
4 QUESTION 3: Determination of the density of an alcohol In order to determine the density of an alcohol, we take a solid (S) suspended from the free end of a spring balance, and two containers: one containing water and the other alcohol. Take g = 10 N/kg. I- Real weight of (S) (S) is in equilibrium in air. The spring balance indicates 8 N. This indication represents the value P of the real weight of (S). Why? II- Volume of (S) We immerse (S) completely in water of density ρ = 1000 kg/m3 (fig. 1). The spring balance then indicates 7 N. 1) What does the indication of the spring balance represent? 2) Calculate the value F of the Archimedes up thrust exerted by water on (S). 3) Deduce the volume V of (S). III- Density of the alcohol Now, (S) is completely immersed in alcohol (fig. 2). The spring balance indicates in this case 7.2 N. 1) Calculate the value F' of Archimedes up thrust exerted by the alcohol on (S). 2) Deduce the value ρ' of the density of this alcohol. QUESTION 4: A sphere (A) of mass 2.5kg & density 6250 kg/m 3 is suspended to the free end of a vertical spring whose free length is 30 cm and whose constant is 125 N/m. Take g = 10 N/kg. 1- Calculate the length of the spring when (A) is in air. 2- The sphere (A) is completely immersed in water of density 1000 kg/m 3. a) Find Archimedes up-thrust exerted by water on the sphere (A). b) Calculate the length of spring when (A) is completely immersed in water. QUESTION 5: A balloon has a mass m 1 = 0.55 kg when inflated, it contains 5m 3 of helium gas of density 0.09 kg/m 3. We attach to its lower part a mass M = 2.25 kg. The system is immersed in air of density 1.3 kg/m 3. Take g = 10 N/kg, we neglect the volume of the mass a) list the forces acting on the system S= (balloon, helium, mass) b) What is the total weight of system S? c) Find Archimedes Up-thrust by air on system (S). d) Represent the forces acting on S.
5 e) Can the system rise up (fly)? Justify your answer. QUESTION 6: A cylinder (C) of density 600 Kg/m 3 and volume 100 cm 3 is immersed in a vessel containing alcohol of density 800 kg/m 3. a) Will the cylinder (C) float in alcohol? Justify your answer. b) What are the forces acting on C? c) What is the relation between these forces? d) What is the immersed volume of (C) in the liquid? Take g = 10 N/kg. QUESTION 7: To show the dangers of icebergs on navigation, we consider a block of ice, of volume 1000 cm 3, floating on the surface of salty water as shown in the adjacent figure. Given: - Density of salty water kg/m 3. - Density of ice: 920kg/m 3. - g = 10 N/kg. 1) Explain why the block of ice floats on the surface of salty water? Dose this block float on the surface of oil having a density of 900 kg/m 3? 2) The block of ice is at equilibrium on the surface salty water. What are the forces acting on the block to maintain its equilibrium? Give the direction and the magnitude of each of these forces. 3) Find the volume of the immersed part of the block. 4) Compare the volume of the immersed part of the block to the total volume of this block. What do you conclude about the dangers of icebergs on navigation? 5) Give the name of a ship you heard about that did sink due to icebergs. QUESTION 8: A Solid (S) of mass m = 300 g floats at equilibrium at the surface of oil of density 920 kg/m 3. (S) floats at the surface of the water of the lake of density 1000 kg/m 3. A. First experiment 1) What condition must the two forces acting on (S) satisfy so that it floats at the surface of oil? 2) Calculate the value of the weight of (S). Deduce the value of Archimedes up thrust. 3) Calculate the volume V 1 of the immersed part of (S). B. Second experiment (S) floats at the surface of water of density 1000 kg/m 3 3. Is Archimedes up thrust remaining the same? Why? 4. Without calculation justify that V 2 <V 1.
6 C. Conclusion: Is there at equilibrium a relation between Archimedes up thrust force and the volume of the immersed part in liquids?justify.
storage tank, or the hull of a ship at rest, is subjected to fluid pressure distributed over its surface.
Hydrostatic Forces on Submerged Plane Surfaces Hydrostatic forces mean forces exerted by fluid at rest. - A plate exposed to a liquid, such as a gate valve in a dam, the wall of a liquid storage tank,
More informationCHAPTER 10- GRAVITATION
CHAPTER 10- GRAVITATION KEY CONCEPTS [ *rating as per the significance of concept] 1 Gravitation *** 2 Universal Law Of Gravitation **** 3 Free Fall ** 4 To Calculate The Value Of G **** 5 Mass & Weight
More informationPhysics 107 HOMEWORK ASSIGNMENT #9
Physics 07 HOMEORK ASSIGNMENT #9 Cutnell & Johnson, 7 th edition Chapter : Problems 6, 8, 33, 40, 44 *6 A 58-kg skier is going down a slope oriented 35 above the horizontal. The area of each ski in contact
More informationChapter 15. m. The symbolic equation for mass density is: ρ= m V. Table of Densities
Chapter 15 Density Often you will hear that fiberglass is used for racecars because it is lighter than steel. This is only true if we build two identical bodies, one made with steel and one with fiberglass.
More informationUpthrust and Archimedes Principle
1 Upthrust and Archimedes Principle Objects immersed in fluids, experience a force which tends to push them towards the surface of the liquid. This force is called upthrust and it depends on the density
More informationPHYSICS HYDROSTATICS FORM 5
Pressure Pressure is defined as force per unit area. Pressure = Force Area Pressure = Newton (metre) 2 1 Pa = 1N/m 2 Which of the following exerts a greater pressure? A woman of mass 70kg stepping on your
More informationCHAPTER 13. Liquids FLUIDS FLUIDS. Gases. Density! Bulk modulus! Compressibility. To begin with... some important definitions...
CHAPTER 13 FLUIDS Density! Bulk modulus! Compressibility Pressure in a fluid! Hydraulic lift! Hydrostatic paradox Measurement of pressure! Manometers and barometers Buoyancy and Archimedes Principle! Upthrust!
More informationPH1011 Tut 4: Forces, Momentum and Impulse
PH1011 Tut 4: Forces, Momentum and Impulse 1) [ A J86/II/8] When a body moves through a fluid, a retarding force due to turbulence may be experienced. In the case of a sphere of radius r moving with speed
More informationLiquids CHAPTER 13 FLUIDS FLUIDS. Gases. Density! Bulk modulus! Compressibility. To begin with... some important definitions...
CHAPTER 13 FLUIDS FLUIDS Liquids Gases Density! Bulk modulus! Compressibility Pressure in a fluid! Hydraulic lift! Hydrostatic paradox Measurement of pressure! Manometers and barometers Buoyancy and Archimedes
More informationThere are three phases of matter: Solid, liquid and gas
FLUIDS: Gases and Liquids Chapter 4 of text There are three phases of matter: Solid, liquid and gas Solids: Have form, constituents ( atoms and molecules) are in fixed positions (though they can vibrate
More informationChapter 9: Solids and Fluids
Chapter 9: Solids and Fluids State of matters: Solid, Liquid, Gas and Plasma. Solids Has definite volume and shape Can be crystalline or amorphous Molecules are held in specific locations by electrical
More informationCLASS-VIII MATHEMATICS KEY DAY-6 KEY DAY-1 KEY DAY-7 KEY DAY-2 KEY DAY-8 KEY DAY-3 KEY DAY-9 KEY DAY-4 KEY DAY-10 KEY DAY-5 KEY MPC BRIDGE COURSE
MATHEMATICS KEY DAY-1 KEY 1) 3 ) 3) 3 4) 1 5) 6) 1 7) 8) 1 9) 10) 1 11) 1) 3 13) 14) 1 15) 1 16) 3 17) 1 18) 1 19) 1 DAY- KEY 1) 1 ) 4 3) 4 4) 1 5) 4 6) 3 7) 8) 9) 1 10) 1 11) 3 1) 1 13) 14) 1 15) 1 16)
More informationCHAPTER 28 PRESSURE IN FLUIDS
CHAPTER 8 PRESSURE IN FLUIDS EXERCISE 18, Page 81 1. A force of 80 N is applied to a piston of a hydraulic system of cross-sectional area 0.010 m. Determine the pressure produced by the piston in the hydraulic
More informationEQUILIBRIUM OBJECTIVES PRE-LECTURE
27 FE3 EQUILIBRIUM Aims OBJECTIVES In this chapter you will learn the concepts and principles needed to understand mechanical equilibrium. You should be able to demonstrate your understanding by analysing
More informationPHYSICS 220 Lecture 16 Fluids Textbook Sections
PHYSICS 220 Lecture 16 Fluids Textbook Sections 10.1-10.4 Lecture 16 Purdue University, Physics 220 1 States of Matter Fluids Solid Hold Volume Hold Shape Liquid Hold Volume Adapt Shape Gas Adapt Volume
More informationStatic Forces on Surfaces-Buoyancy. Fluid Mechanics. There are two cases: Case I: if the fluid is above the curved surface:
Force on a Curved Surface due to Hydrostatic Pressure If the surface is curved, the forces on each element of the surface will not be parallel (normal to the surface at each point) and must be combined
More informationStevens High School AP Physics II Work for Not-school
1. (AP SAMPLE QUESTION) An ideal fluid is flowing with a speed of 12 cm/s through a pipe of diameter 5 cm. The pipe splits into three smaller pipes, each with a diameter of 2 cm. What is the speed of the
More informationPHY131H1F Summer Class 11. What term is used to describe an oscillator that runs down and eventually stops?
PHY131H1F Summer Class 11 Today: Hanging Springs The Pendulum Damped Oscillations; Shock Absorbers Driven Oscillations; Resonance Fluids Pressure Pascal s Law Gauge Pressure Italian opera singer Luigi
More informationNicholas J. Giordano. Chapter 10 Fluids
Nicholas J. Giordano www.cengage.com/physics/giordano Chapter 10 Fluids Fluids A fluid may be either a liquid or a gas Some characteristics of a fluid Flows from one place to another Shape varies according
More informationWRITE ALL YOUR CALCULATIONS IN THE BLUEBOOK PUT YOUR NAME AND THE TEST IN THE BLUEBOOK AND HAND IN
Physics 6B - MWF - Midterm 1 Test #: A Name: Perm #: Section (10-11 or 12-1): You MUST put the TEST # in the first answer bubble. The TA will explain. YOU MUST do this or the test will not be graded. WRITE
More informationFluid: Air and water are fluids that exert forces on the human body.
Fluid: Air and water are fluids that exert forces on the human body. term fluid is often used interchangeably with the term liquid, from a mechanical perspective, Fluid: substance that flows when subjected
More informationHydrostatics. ENGR 5961 Fluid Mechanics I: Dr. Y.S. Muzychka
1 Hydrostatics 2 Introduction In Fluid Mechanics hydrostatics considers fluids at rest: typically fluid pressure on stationary bodies and surfaces, pressure measurements, buoyancy and flotation, and fluid
More informationGRAVITATION. Sir Issac Newton. Johannes Kepler ( ) ( )
GRAVITATION Johannes Kepler Sir Issac Newton (1571-1630) (1643-1727) Created by C. Mani, Principal, K V No.1, AFS, Jalahalli West, Bangalore 1. Gravitational Force or Gravity 2. Newton s Universal Law
More informationPage 1. Physics 131: Lecture 23. Today s Agenda. Announcements. States of Matter
Physics 131: Lecture 3 Today s Agenda Description of Fluids at Rest Pressure vs Depth Pascal s Principle: hydraulic forces Archimedes Principle: objects in a fluid Bernoulli s equation Physics 01: Lecture
More informationSponsored by H.E. Prof. Kivutha Kibwana, Governor, Makueni County.
Name... Index Number... School... Candidate s Signature... 232/1 Date... PHYSICS Paper 1 (THEORY) 2015 2 hours MAKUENI COUNTY KCSE 2015 PREPARATORY EXAMINATION Kenya Certificate of Secondary Education
More informationPhysics 220: Classical Mechanics
Lecture 10 1/34 Phys 220 Physics 220: Classical Mechanics Lecture: MWF 8:40 am 9:40 am (Phys 114) Michael Meier mdmeier@purdue.edu Office: Phys Room 381 Help Room: Phys Room 11 schedule on course webpage
More informationChapter 14. Lecture 1 Fluid Mechanics. Dr. Armen Kocharian
Chapter 14 Lecture 1 Fluid Mechanics Dr. Armen Kocharian States of Matter Solid Has a definite volume and shape Liquid Has a definite volume but not a definite shape Gas unconfined Has neither a definite
More informationTypes of Forces. Pressure Buoyant Force Friction Normal Force
Types of Forces Pressure Buoyant Force Friction Normal Force Pressure Ratio of Force Per Unit Area p = F A P = N/m 2 = 1 pascal (very small) P= lbs/in 2 = psi = pounds per square inch Example: Snow Shoes
More information11.1 Mass Density. Fluids are materials that can flow, and they include both gases and liquids. The mass density of a liquid or gas is an
Chapter 11 Fluids 11.1 Mass Density Fluids are materials that can flow, and they include both gases and liquids. The mass density of a liquid or gas is an important factor that determines its behavior
More informationFluid Mechanics. If deformation is small, the stress in a body is proportional to the corresponding
Fluid Mechanics HOOKE'S LAW If deformation is small, the stress in a body is proportional to the corresponding strain. In the elasticity limit stress and strain Stress/strain = Const. = Modulus of elasticity.
More informationρ mixture = m mixture /V = (SG antifreeze ρ water V antifreeze + SG water ρ water V water )/V, so we get
CHAPTER 10 1. When we use the density of granite, we have m = ρv = (.7 10 3 kg/m 3 )(1 10 8 m 3 ) =.7 10 11 kg.. When we use the density of air, we have m = ρv = ρlwh = (1.9 kg/m 3 )(5.8 m)(3.8 m)(.8 m)
More informationChapter 14. Fluid Mechanics
Chapter 14 Fluid Mechanics States of Matter Solid Has a definite volume and shape Liquid Has a definite volume but not a definite shape Gas unconfined Has neither a definite volume nor shape All of these
More informationMechanics Kit #MECHKT
Phone: 417.347.7431 Fax: 417.374.7442 service@gosciencecrazy.com 1747 North Deffer Drive Nixa, Missouri 65714 Mechanics Kit #MECHKT Introduction Warning: Mechanics refers broadly to the study of forces
More informationTOPICS. Density. Pressure. Variation of Pressure with Depth. Pressure Measurements. Buoyant Forces-Archimedes Principle
Lecture 6 Fluids TOPICS Density Pressure Variation of Pressure with Depth Pressure Measurements Buoyant Forces-Archimedes Principle Surface Tension ( External source ) Viscosity ( External source ) Equation
More informationObjective: To enable the students to describe, state and derive the terms and expressions relevant in carrying out experiment 5 meaningfully.
Pre-Lab Questions 5 Topic: Archimedes Principle Objective: To enable the students to describe, state and derive the terms and expressions relevant in carrying out experiment 5 meaningfully. After successfully
More informationPhysics 115, Investigating Physical Science Weight and Mass
Physics 115, Investigating Physical Science Weight and Mass The Mass of an object is defined to be the number of grams (or kilograms) it takes to balance the object on an equal arm balance. 1 kg = 1000
More informationDensity of Matter Version 6.3
Density of Matter Version 6.3 Michael J. Vitarelli Jr. Department of Chemistry and Chemical Biology Rutgers University, 610 Taylor Road, Piscataway, NJ 08854 I. INTRODUCTION Physical properties of matter
More informationQuebec - Achievements and Competencies
Buoyancy Quebec - Learning Outcomes Cycle 1 (Gr. 7-8) Cycle 2 (Gr. 9-10) Properties of matter Properties of solutions Chemical changes Characteristic physical properties Chemical changes The Quebec are
More information2.6 Force reacts with planar object in fluid
2.6 Force reacts with planar object in fluid Fluid surface Specific weight (γ) => Object sinks in fluid => C is center of gravity or Centroid => P is center of pressure (always under C) => x axis is cross
More information1) Law of Orbits - all planets move in elliptical orbits with the Sun at one focus
1) Law of Orbits - all planets move in elliptical orbits with the Sun at one focus 2) Law of equal areas - ANGULAR MOMENTUM IS CONSERVED A line that connects a planet to the Sun sweeps out equal areas
More informationKENYA NATIONAL EXAMINATION COUNCIL REVISION MOCK EXAMS 2016 TOP NATIONAL SCHOOLS
KENYA NATIONAL EXAMINATION COUNCIL REVISION MOCK EXAMS 2016 TOP NATIONAL SCHOOLS ALLIANCE GIRLS HIGH SCHOOL 232/1 PHYSICS PAPER 1 SCHOOLS NET KENYA Osiligi House, Opposite KCB, Ground Floor Off Magadi
More informationDiscuss and apply Newton s laws (i.e., first, second, third, and law of universal gravitation)
PART I. SUBAREA I. UNDERSTANDING AND SKILL IN PHYSICS MOTION AND FORCES COMPETENCY 1.1 MOTION AND FORCES Skill 1.1a Discuss and apply Newton s laws (i.e., first, second, third, and law of universal gravitation)
More informationL = I ω = const. I = 2 3 MR2. When the balloon shrinks (because the air inside it cools down), the moment of inertia decreases, R = 1. L = I ω = I ω.
PHY 30 K. Solutions for mid-term test #3. Problem 1: Out in space, there are no forces acting on the balloon except gravity and hence no torques (with respect to an axis through the center of mass). Consequently,
More informationPHYSICS 102N Spring Week 2 Solids and Liquids
PHYSICS 102N Spring 2009 Week 2 Solids and Liquids Condensed Matter Common feature: Atoms/molecules are tightly packed together (equilibrium distance) Any closer: Repulsion due to electromagnetic interaction
More informationFluid Mechanics-61341
An-Najah National University College of Engineering Fluid Mechanics-61341 Chapter [2] Fluid Statics 1 Fluid Mechanics-2nd Semester 2010- [2] Fluid Statics Fluid Statics Problems Fluid statics refers to
More informationPhysics 220: Classical Mechanics
Lecture /33 Phys 0 Physics 0: Classical Mechanics Lecture: MWF 8:40 am 9:40 am (Phys 4) Michael Meier mdmeier@purdue.edu Office: Phys Room 38 Help Room: Phys Room schedule on course webpage Office Hours:
More informationKenya Certificate of Secondary Education (K.C.S.E.)
Name.. Index No:. 233/1 Candidate s Signature.. PHYSICS 1 Date: PAPER 1 THEORY JULY/AUGUST 2014 TIME: 2 HOURS Kenya Certificate of Secondary Education (K.C.S.E.) 232/1 Physics Paper 1 2 hours INSTRUCTIONS
More informationDEVIL PHYSICS THE BADDEST CLASS ON CAMPUS IB PHYSICS
DEVIL PHYSICS THE BADDEST CLASS ON CAMPUS IB PHYSICS TSOKOS LSN 2-3 THE CONCEPT OF FORCE Introductory Video Introducing Sir Isaac Newton Objectives By the end of this class you should be able to: State
More informationChapter 9. Solids and Fluids. 1. Introduction. 2. Fluids at Rest. 3. Fluid Motion
Chapter 9 Solids and Fluids 1. Introduction 2. Fluids at Rest 3. Fluid Motion 1 States of Matter Solid Liquid Gas Plasma 2 Density and Specific Gravity What is Density? How do I calculate it? What are
More informationTest 3 Preparation Questions
Test 3 Preparation Questions A1. Which statement is true concerning an object executing simple harmonic motion? (A) Its velocity is never zero. (B) Its acceleration is never zero. (C) Its velocity and
More informationME 262 BASIC FLUID MECHANICS Assistant Professor Neslihan Semerci Lecture 4. (Buoyancy and Viscosity of water)
ME 262 BASIC FLUID MECHANICS Assistant Professor Neslihan Semerci Lecture 4 (Buoyancy and Viscosity of water) 16. BUOYANCY Whenever an object is floating in a fluid or when it is completely submerged in
More informationChapter 12. Fluid Mechanics. A. The density ρ of a substance of uniform composition is defined as its mass M divided by its volume V.
Chapter 12 Fluid Mechanics 12.1 Density A. The density ρ of a substance of uniform composition is defined as its mass M divided by its volume V. That is,! = M V The density of water at 4 o C is 1000 kg/m
More informationTheme 2 - PHYSICS UNIT 2 Forces and Moments. A force is a push or a pull. This means that whenever we push or pull something, we are doing a force.
Forces A force is a push or a pull. This means that whenever we push or pull something, we are doing a force. Forces are measured in Newtons (N) after the great physicist Sir Isaac Newton. The instrument
More informationScience Is A Verb! Part 7. Let s do it! ISBN
Let s do it! Science Is A Verb! Part 7 ISBN 978-1-847003-60-7 Contents INTRODUCTION Lab Title Where are we positioned? Students know position is defined in relation to some choice of a standard reference
More informationFORCES. Challenging MCQ questions by The Physics Cafe. Compiled and selected by The Physics Cafe
FORCES Challenging MCQ questions by The Physics Cafe Compiled and selected by The Physics Cafe 1 A cupboard is attached to a wall by a screw. Which force diagram shows the cupboard in equilibrium, with
More informationKing Fahd University of Petroleum and Minerals Department of Physics. Final Exam 041. Answer key - First choice is the correct answer
King Fahd University of Petroleum and Minerals Department of Physics MSK Final Exam 041 Answer key - First choice is the correct answer Q1 A 20 kg uniform ladder is leaning against a frictionless wall
More informationChapter 2 Hydrostatics Buoyancy, Floatation and Stability
Chapter 2 Hydrostatics uoyancy, Floatation and Stability Zerihun Alemayehu Rm. E119 AAiT Force of buoyancy an upward force exerted by a fluid pressure on fully or partially floating body Gravity Archimedes
More informationLesson 6 Matter. Introduction: Connecting Your Learning
Lesson 6 Matter Introduction: Connecting Your Learning The previous lessons discussed mechanics and many forms of motion. Lesson 6 introduces the second major topic in physics, which is matter. This lesson
More informationChapter 1 INTRODUCTION
Chapter 1 INTRODUCTION 1-1 The Fluid. 1-2 Dimensions. 1-3 Units. 1-4 Fluid Properties. 1 1-1 The Fluid: It is the substance that deforms continuously when subjected to a shear stress. Matter Solid Fluid
More informationPhysics - Fluids. Read Page 174 (Density) TQ1. A fluid is what type of matter? TQ2. What is fluid mechanics? TQ3. What is the equation for density?
Homework Procedure: Read pages specified in Honors Physics Essentials by Dan Fullerton. Questions labeled TQ will be questions about the text you read. These TQ s can be answered in one word, one phrase,
More informationANSWERS TO REVIEW QUESTIONS
Answers: Review questions 25 ANSERS O REVIE QUESIONS IMPORAN NOE: READ HIS FIRS. here are three different kinds of answer here. he usual form for quantitative questions is a short entry giving the final
More informationA. 50 N B. 100 N C. 20 N D. 0 N E. 500 N
SQ1: A 0.05-kg tennis ball moving to the right with a speed of 10 m/s is struck by a tennis racket, causing it to move to the left with a speed of 10 m/s. If the ball remains in contact with the racquet
More informationMULTIPLE-CHOICE PROBLEMS:(Two marks per answer) (Circle the Letter Beside the Most Correct Answer in the Questions Below.)
MULTIPLE-CHOICE PROLEMS:(Two marks per answer) (Circle the Letter eside the Most Correct Answer in the Questions elow.) 1. The absolute viscosity µ of a fluid is primarily a function of: a. Density. b.
More informationChapter 15: Fluid Mechanics Dynamics Using Pascal s Law = F 1 = F 2 2 = F 2 A 2
Lecture 24: Archimedes Principle and Bernoulli s Law 1 Chapter 15: Fluid Mechanics Dynamics Using Pascal s Law Example 15.1 The hydraulic lift A hydraulic lift consists of a small diameter piston of radius
More informationName : Applied Physics II Exam One Winter Multiple Choice ( 7 Points ):
Name : e-mail: Applied Physics II Exam One Winter 2006-2007 Multiple Choice ( 7 Points ): 1. Pure nitrogen gas is contained in a sealed tank containing a movable piston. The initial volume, pressure and
More informationSample paper 10. Question 1. Which of the following is correct in respect to acceleration?
Sample paper 10 Question 1 Which of the following is correct in respect to acceleration? A. Body does not require any force to accelerate B. Body s velocity should be zero C. Body should be at rest D.
More informationThe meter-stick is in equilibrium, so the net force and the net torque on it must be zero, F = 0,
PHY 309 K. Solutions for mid-term test #3. Problem #1: There are three forces acting on the meter-stick: the tension T of the upper string, the tension T = mg (where m = 50 g) of the lower string, and
More informationDENSITY OF AN IRREGULAR SHAPED OBJECT
MASS 9/28/2017 AP PHYSICS 2 DENSITY UNIT 1 FLUID STATICS AND DYNAMICS CHAPTER 10 FLUIDS AT REST 0.12 0.1 0.08 0.06 0.04 0.02 0 MASS vs. VOLUME y = 1000x 0 0.00002 0.00004 0.00006 0.00008 0.0001 0.00012
More informationPhysics 201, Lecture 26
Physics 201, Lecture 26 Today s Topics n Fluid Mechanics (chapter 14) n Review: Pressure n Buoyancy, Archimedes s Principle (14.4) n Fluid Dynamics, Bernoulli s Equation (14.5,14.6) n Applications of Fluid
More informationPhysics 111. Thursday, November 11, 2004
ics Thursday, ember 11, 2004 Ch 15: Fluids Pascal s Principle Archimede s Principle Fluid Flows Continuity Equation Bernoulli s Equation Toricelli s Theorem Announcements Wednesday, 8-9 pm in NSC 118/119
More informationChapter 15 - Fluid Mechanics Thursday, March 24 th
Chapter 15 - Fluid Mechanics Thursday, March 24 th Fluids Static properties Density and pressure Hydrostatic equilibrium Archimedes principle and buoyancy Fluid Motion The continuity equation Bernoulli
More informationChapter 14 - Fluids. -Archimedes, On Floating Bodies. David J. Starling Penn State Hazleton PHYS 213. Chapter 14 - Fluids. Objectives (Ch 14)
Any solid lighter than a fluid will, if placed in the fluid, be so far immersed that the weight of the solid will be equal to the weight of the fluid displaced. -Archimedes, On Floating Bodies David J.
More informationPhysics( Revision worksheet)
Physics( Revision worksheet) 1.What is true of an object that is in free fall? A. No forces are acting on it. B. Only the force of gravity is accelerating it. C. The forces of thrust and gravity balance
More information1. The nucleus of a certain isotope of tin contains 68 neutrons and 50 protons. Which symbol correctly represents this isotope? A.
Page 1 of 6 1. The nucleus of a certain isotope of tin contains 68 neutrons and 50 protons. Which symbol correctly represents this isotope? A. B. C. D. E. 2. A guitar string produces 4 beats/s when sounded
More informationNAME...ADM NO..CLASS. 232/1 Candidate s Signature. Physics. Kenya Certificate of Secondary Education PHYSICS. Paper 1. 2 hours
NAME.....ADM NO..CLASS 232/1 Candidate s Signature. Physics Paper 1 Date June 2017 2 hours INSTRUCTIONS TO CANDIDATES Kenya Certificate of Secondary Education PHYSICS Paper 1 2 hours Write your name, Adm
More informationPhysics 6B. Practice Midterm #1 Solutions
Physics 6B Practice Midterm #1 Solutions 1. A block of plastic with a density of 90 kg/m 3 floats at the interface between of density 850 kg/m 3 and of density 1000 kg/m 3, as shown. Calculate the percentage
More informationArchimedes Principle
. Object Archimedes Principle To determine the density of objects by using Archimedes principle and to compare with a density measured directly.. Apparatus Assorted masses, balance, beakers, graduated
More informationNEW HORIZON SCHOOL WORKSHEETS TERM 2 SESSION [CLASS 9] Physics
Physics GRAVITATION 1. Pascal is a unit of a) pressure b) force c) linear momentum d) energy 2. The buoyant force on a body acts in a a) vertically downward direction b) vertically upward direction c)
More informationUNIVERSITY OF SASKATCHEWAN Department of Physics and Engineering Physics
UNIVERSITY OF SASKATCHEWAN Department of Physics and Engineering Physics Physics 117.3 MIDTERM TEST February 11, 2016 Time: 90 minutes NAME: SOLUTIONS (Last) Please Print (Given) STUDENT NO.: LECTURE SECTION
More informationPhy 212: General Physics II. Daniel Bernoulli ( )
Phy 1: General Physics II Chapter 14: Fluids Lecture Notes Daniel Bernoulli (1700-178) Swiss merchant, doctor & mathematician Worked on: Vibrating strings Ocean tides Kinetic theory Demonstrated that as
More informationPressure in a fluid P P P P
Fluids Gases (compressible) and liquids (incompressible) density of gases can change dramatically, while that of liquids much less so Gels, colloids, liquid crystals are all odd-ball states of matter We
More informationPHYSICS I1 EXAM 3 FALL 2005
PHYSCS 1 EXAM 3 FALL 2005 37. A 0.02 kg mass is attached to a massless spring as shown to the right and vibrates with simple harmonic motion with an amplitude of 5.0 cm. The spring constant is 300 Nlm.
More informationA moving object changes its position with time. If the object travels a distance s in time t then its speed is s v = (1)
To plot distance time (s t ) graph for an object moving with a uniform speed from a given set of s and t data and to determine the speed of the object. A moving object changes its position with time. If
More informationPHYS 185 Practice Final Exam Fall You may answer the questions in the space provided here, or if you prefer, on your own notebook paper.
PHYS 185 Practice Final Exam Fall 2013 Name: You may answer the questions in the space provided here, or if you prefer, on your own notebook paper. Short answers 1. 2 points When an object is immersed
More informationS.3 PHYSICS HOLIDAY WORK Where necessary assume the acceleration due to gravity, g 10ms. 1. 7. 13. 19. 25. 2. 8. 14. 20. 26. 3. 9. 15. 21. 27. 4. 10. 16. 22. 28. 5. 11. 17. 23. 29. 6. 12. 18. 24. 30. SECTION
More informationMatter and Thermal Energy
Section States of Matter Can you identify the states of matter present in the photo shown? Kinetic Theory The kinetic theory is an explanation of how particles in matter behave. Kinetic Theory The three
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 informationEric G. Paterson. Spring 2005
Eric G. Paterson Department of Mechanical and Nuclear Engineering Pennsylvania State University Spring 2005 Reading and Homework Read Chapter 3. Homework Set #2 has been posted. Due date: Friday 21 January.
More informationHalliday/Resnick/Walker 7e Chapter 14
HRW 7e Chapter 4 Page of 8 Halliday/Resnick/Walker 7e Chapter 4. The air inside pushes outard ith a force given by p i A, here p i is the pressure inside the room and A is the area of the indo. Similarly,
More informationUnit 4: The Nature of Matter
16 16 Table of Contents Unit 4: The Nature of Matter Chapter 16: Solids, Liquids, and Gases 16.1: Kinetic Theory 16.2: Properties and Fluids 16.3: Behavior of Gases 16.1 Kinetic Theory Kinetic Theory kinetic
More information5.1 Fluid momentum equation Hydrostatics Archimedes theorem The vorticity equation... 42
Chapter 5 Euler s equation Contents 5.1 Fluid momentum equation........................ 39 5. Hydrostatics................................ 40 5.3 Archimedes theorem........................... 41 5.4 The
More informationKey Ideas for These Lectures
Ideas and Questions for Session 3 Charles (Andy) Anderson Key Ideas for These Lectures I. Nature of scientific reasoning II. Instructional representations III. Learning and inquiry cycles IV. Assessment
More informationANALYSIS OF VOLUME AND DENSITY OF A SOLID MATERIAL AND ARCHIMEDES PRINCIPLE
EXPERIMENT 1 ANALYSIS OF VOLUME AND DENSITY OF A SOLID MATERIAL AND ARCHIMEDES PRINCIPLE Purpose : 1.)The goal of this laboratory is to measure the mass and the dimensions of solids and to determine their
More informationFORCE AND MOTION CHAPTER 3
FORCE AND MOTION CHAPTER 3 Review: Important Equations Chapter 2 Definitions Average speed: Acceleration: v = d t v = Δd a = Δv Δt = v v 0 t t 0 Δt = d d 0 t t 0 Derived Final velocity: Distance fallen:
More informationUnit 4 Mass, Weight, and Density
Unit 4 Mass, Weight, and Density Lesson Objectives State that mass is a measure of the amount of substance in a body State that the mass of a body resists a change in the state of rest or motion of the
More informationYou are responsible for recording your 9 digit PSU Student ID on your scantron form
Tuesday, July 28; 9:35AM 10:50AM in 273 Willard 20 Mul=ple Choice Ques=ons See Folder in Exam Resources Midterm 2 Informa=on You are responsible for recording your 9 digit PSU Student ID on your scantron
More informationMULTIPLE-CHOICE PROBLEMS :(Two marks per answer) (Circle the Letter Beside the Most Correct Answer in the Questions Below.)
Test Midterm 1 F2013 MULTIPLE-CHOICE PROBLEMS :(Two marks per answer) (Circle the Letter Beside the Most Correct nswer in the Questions Below.) 1. The absolute viscosity µ of a fluid is primarily a function
More informationMass per unit volume Mass of 1 m 3. Units of density = kg m 3 Density is a scalar. mass volume. density = m V. rho. 1m x 1m x 1m
1 Mass per unit volume Mass of 1 m 3 density = mass volume rho ρ = m V 1m x 1m x 1m Units of density = kg m 3 Density is a scalar 2 1000 kg 5100 kg 8900 kg Each has a volume of 1 m 3. Which has the greatest
More informationMECHANICAL PROPERTIES OF FLUIDS
CHAPTER-10 MECHANICAL PROPERTIES OF FLUIDS QUESTIONS 1 marks questions 1. What are fluids? 2. How are fluids different from solids? 3. Define thrust of a liquid. 4. Define liquid pressure. 5. Is pressure
More informationLecture 1. Fluids at rest. Physics 103 Spring 2012 Torricelli.
Lecture 1 Fluids at rest Pascal Physics 103 Spring 2012 Torricelli http://web.njit.edu/~sirenko/phys-103-2005/phys-103-2012.htm 2012 Andrei Sirenko, NJIT 1 PRESSURE 2012 Andrei Sirenko, NJIT 2 DENSITY
More information