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Example problems: Work & Power •Two soccer players work out in the off season by sprinting up a 40º hill for a distance of 100 m before stopping, resting, and walking back down. Mia has a mass of 60 kg. Julie has a mass of 65 kg. ... Microsoft PowerPoint - Work, Power, and Energy - Animation 98 Author:

Work, Power, and Energy - Animation 98 - ASU

Example problems: Work & Power •Two soccer players work out in the off season by sprinting up a 40º hill for a distance of 100 m before stopping, resting, and walking back down. Mia has a mass of 60 kg. Julie has a mass of 65 kg. ... Microsoft PowerPoint - Work, Power, and Energy - Animation 98 Author:

Work and Energy Chapter 5 Work, 5.1 Work Power 5.2 Energy ...

previous page, all five joules of input work were transformed to five joules of output work. An engineer would say the machine was 100 percent efficient, because all the input work became output work and none was lost. How friction affects real machines In real machines, the work output is always less than the work input.

Work, Energy, and Power Name: Lesson 2 Work, Energy and ...

a. TME conserved b. TME increases c. TME decreases 7. A marble starts from rest and rolls down an inclined plane. Ignore friction. a. TME conserved b. TME increases c. TME decreases 8. A physics student runs up a flight of stairs at constant speed. a. TME conserved b. TME increases c. TME decreases 9. A baseball makes its flight through the air ...

Energy, Kinetic Energy, Work, Dot Product, and Power

Energy, Kinetic Energy, Work, Dot Product, and Power 8.01t Oct 13, 2004. Energy Transformations • Falling water releases stored ‘gravitational potential energy’ turning into a ‘kinetic energy’ ... acting on the body is the product of the component of the force in the direction

Work, Energy & Power

Work, Energy & Power AP Physics B. There are many different TYPES of Energy. Energy is expressed in JOULES (J) 4.19 J = 1 calorie Energy can be expressed more specifically by using the term WORK(W) Work = The Scalar Dot Product between Force and Displacement.

Work, Energy & Power - bowlesphysics.com

Work, Energy & Power AP Physics B. There are many different TYPES of Energy. Energy is expressed in JOULES (J) 4.19 J = 1 calorie Energy can be expressed more specifically by using the term WORK(W) Work = The Scalar Dot Product between Force and Displacement. So that means if you apply a force on an object and it covers a displacement you have ...

Energy, Work, & Power - ntschools.org

4. A 25-gram paper cup falls from rest off the edge of a tabletop 0.90 meter above the floor. If the cup has 0.20 joule of kinetic energy when it hits the floor, what is the total amount of energy converted into internal (thermal) energy during the cup’s fall? (1) 0.02 J (2) 0.22 J (3) 2.2 J (4) 220 J 5.

Work, Power and Energy Worksheet

Calculate the work done by a 47 N force pushing a 0.025 kg pencil 0.25 m against a force of 23 N. 3. Calculate the work done by a 2.4 N force pushing a 400 g sandwich across a table 0.75 m wide.

CHAPTER 16 WORK, ENERGY AND POWER

CHAPTER 16 WORK, ENERGY AND POWER EXERCISE 88, Page 201 ... Calculate the work done when a mass of weight 200 N is lifted vertically by a crane to a height of 100 m. ... The output power of a motor is 10 kW. How much work does it do in 1 minute? Power = workdone timetaken. from which,

Work, Energy and Power - mr mackenzie

Work, Energy and Power In this section of the Transport unit, we will look at the energy changes that take place when a force acts upon an object. Energy can’t be created or destroyed, it can only be changed from one type into another type. We call this rule conservation of energy. Work Work and energy are the same thing. When a force moves

WORK, POWER, AND ENERGY CONCEPT QUESTIONS

If you lift two loads up one story, how much work do you do compared to lifting just one load up ... How much work is done on a 60-N box of boo ks that you carry horizontally across a 6-m room? ... a. 0 J b. 1 J c. 2 J d. 20 J e. 40 J ____ 27. How much power is expended if you lift a 6 0 N crate 10 meters in 1 second? a. 0 W b. 6 W c. 10 W d. ...

Work, Power, and Energy Webquest Worksheet

Work, Power, and Energy Webquest Worksheet Work ... Draw and label a picture with force and distance to support your answer. Power ... takes them 80 sec to move from the bottom of the plane to the top of it, what is the power if they did 1600 J of work? Imagine a team of horses pulling a plow. If they pull the plow a distance of 100 meters in

Work, Power & Energy Study Guide

Work, Power & Energy Study Guide What is the formula for Work? _____ What unit is Work measured in? _____ What is the formula for Kinetic Energy? ... kinetic energy of block A what is the kinetic energy of block B? 18. A 0.20-kilogram hail dropped vertically from a height of 7.00 meter above the floor bounces hack to a

Work, Power and Energy Problems - slesinskiphysics2.com

4. An ideal gas expands isothermally, performing 4.40 x 103 J of work in the process. a) What is the change in internal energy of the gas? b) How much heat is absorbed during this expansion? 5. An ideal gas has its pressure cut in half slowly, while being kept in a container with rigid walls. In the process, 265 kJ of heat left the gas.

Lesson 2 Work, Energy and Power The Physics Classroom: MOP ...

Work-Energy Bar Charts Read from Lesson 2 of the Work, Energy and Power chapter at The Physics Classroom: ... of physical situations is a work-energy bar chart. A work-energy bar chart represents the amount of energy present in a system by means of a vertical bar. The length of a bar is representative of the amount

Work Energy and Power Practice Test - McKinney ISD

AP Physics 1 Work Energy and Power Practice Test Name_____ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Two objects, one of mass m and the other of mass 2m, are dropped from the top of a building. If there is no air resistance, when they hit the ground

AP Physics 1 - Energy, Work, and Power Practice Test ...

AP Physics 1 - Energy, Work, and Power Practice Test (Multiple Choice Section) Directions: Mark only one answer for each question. Use g = 10 m/s2 for simplicity. 1. Weightlifter A lifts a 50 kg mass 1 m above the ground. Weightlifter B lifts an identical 50 kg mass 2 m above the ground.

Study Lesson 2 Work, Energy and Power chapter at The ...

Work-Energy Calculations Study Lesson 2 of the Work, ... For the following questions, begin with the work-energy equation, cancel terms, substitute and solve. 1. A glider is gliding through the air at a height of 416 meters with a speed of 45.2 m/s. The glider dives to a height of 278 meters. Determine the glider's new speed.

Work, Energy, & Power Practice Quiz Name VOCABULARY ...

Type of energy associated with the motion of an object. ... The sum of the kinetic and potential energy in a system. ... Energy can be converted to different forms or transferred to different places but the total amount of energy does not change. True/False 13. A force acting in the direction an object is moving does positive work.

Name: Date: Physics I H Mr. Tiesler Work, Power & Energy ...

22.) A spring with k=53 N/m hangs vertically next to a ruler. The end of the spring is next to the 15 cm mark on the ruler. If a 2.5 kg mass is now attached to the end of the spring, where will the end of the spring line up with the ruler marks? 23.) A novice skier, starting from rest, slides down a frictionless 35.0º incline whose vertical

Physics 11 – Momentum, Work, Power, Energy Test Review

Physics 11 – Momentum, Work, Power, Energy Test Review IMPULSE AND MOMENTUM: 1. What is the momentum of a 0.25 kg hockey puck traveling at 9 m/s? 2. A 300 N force is applied to a stalled car for 4 seconds. If the car has a mass of 1500 kg, what is the change in velocity of the car? 3.

The Physics Classroom 2009 Answer Key Work Energy And Power

Physics Classroom 2009 Answer Key - Answers Fanatic the physics classroom 2009 series circuits answers - Nov 16, 2009Â Â· This blog is intended to provide teachers with quality links for teaching science that will help to engage pupils in the classroom.The Physics Classroom 2009 Answer Key -

Physics Notes Class 11 CHAPTER 6 WORK, ENERGY AND POWER

Physics Notes Class 11 CHAPTER 6 WORK, ENERGY AND POWER Work When a force acts on an object and the object actually moves in the direction of force, then the work is said to be done by the force. Work done by the force is equal to the product of the force and the displacement of the object

Work, Power & Energy Study Guide - Loudoun County Public ...

Work, Power & Energy Study Guide What is the formula for Work? _____ What unit is Work measured in? ... Block A has a mass of "m" and block B has a mass of 3"m." Block A has a velocity of 4"v" and block B has a velocity of "v." Compared to the kinetic energy of block A what is the kinetic energy of block B? 18. A 0.20-kilogram hail dropped ...

Work and the Work/Kinetic Energy Theorem Potential Energy

Work and the Work/Kinetic Energy Theorem Potential Energy. ... The definition of work W =F Δx corresponds to the intuitive idea of effort: • More massive object will require more work to get to the same ... Use the work-kinetic energy theorem: x v = 10 m/s m = 25 kg k = 3000 N/m

Chapter 14 Work, Power, and Machines 14.1 Work and Power ...

Chapter 14 Work, Power, and Machines 14.1 Work and Power Work is the product of force and distance. You can calculate work by multiplying the force exerted on the object times the distance the object moves. Work = Force x Distance; W = Fd Work is done when a force moves an object over a distance. No work is done if an object does not move or if the force you apply is not in the same direction an

Physics 03-01 Work and the Work-Energy Theorem Name: Work

Physics 03-01 Work and the Work-Energy Theorem Name: _____ Created by Richard Wright – Andrews Academy To be used with OpenStax College Physics Homework 1. A box is being moved with a velocity v by a force P (parallel to v) along a level horizontal floor.The normal force is

Chapter 6 Homework Assignment – Work-Energy Theorem Work

Chapter 6 Homework Assignment – Work-Energy Theorem Work Qu. 1 A factory worker pushes a 30 kg crate a distance 4.5 m along a level floor at constant velocity by pushing horizontally on it. The coefficient of kinetic friction µk = 0.25. a) What magnitude of pushing force P must the worker apply? (Ans: 73.5 N)

Chapter 14 Work, Power, and Machines Section 14.2 Work and ...

Section 14.2 Work and Machines (pages 417–420) This section describes how machines change forces to make work easier to do. Input forces exerted on and output forces exerted by machines are identified and input work and output work are discussed. Reading Strategy (page 417) Summarizing As you read, complete the table for each machine.

Energy and Work Energy is the capacity to do work or to ...

Energy and Work Energy is the capacity to do work or to produce heat. ... Any energy transfer that reduces the energy of the system is a negative number. For us, ... Gases can do work. As a gas in a container expands it pushes against the atmosphere. The gas is doing work. The pressure the gas is

Page: Unit: Work, Energy & Momentum Conservation of Energy

2. A 70. kg pole vaulter converts the kinetic energy of running at ground level into the potential energy needed to clear the crossbar at a height of 4.0 m above the ground. What is the minimum velocity that the pole vaulter must have when taking off from the ground in order to clear the bar? Answer: s 8.9m

AP Physics Practice Test: Work, Energy, Conservation of Energy

AP Physics Practice Test: Work, Energy, Conservation of Energy ©2011, Richard White www.crashwhite.com Part II. Free Response 6. A block of mass m rests on a rough surface, and has a light spring of spring constant k and unstretched length d attached to one side as shown, with the other end of the spring attached to an anchor. There is a

Kinetic Energy & The Work-Energy Theorem - Union College

Work-Energy Theorem The kinetic energy is dened as K = 1 2 mv2 The work done by the net force on the system equals the change in kinetic energy of the system Wnet = Kf Ki = K This is known as the work-energy theorem Units of K and W are the same (joules) Note: when v is a constant, K = 0 and Wnet = 0, e.g. Uniform circular motion 3

Chapter 7 – Kinetic energy, potential energy, work - Physics

Chapter 7 – Kinetic energy, potential energy, work I. Kinetic energy. II. Work. III. Work - Kinetic energy theorem. IV. Work done by a constant force: Gravitational force V. Work done by a variable force. - Spring force. - General: 1D, 3D, Work-Kinetic Energy Theorem ... 20cos30 sin30 ( ) ...

Chapter 7 – Kinetic energy, potential energy, work

II. Work-Kinetic Energy Theorem K K f K i W (7.4) Change in the kinetic energy of the particle = Net work done on the particle III. Work done by a constant force - Gravitational force: W F d mgdcos (7.5) Rising object: W= mgd cos180º = -mgd F g transfers mgd energy from the object’s kinetic energy.

Thermochemistry: Chemical Energy Energy = Work + Heat

6 Example 20 •How much work is done (in kilojoules), and in which direction, as a result of the following reaction? w = -0.25kJ Expansion, system loses -0.25kJ Example 21 •The following reaction has ΔE = –186 kJ/mol. •Is the sign of PΔV positive or negative? •What is the sign and approximate magnitude of ΔH? Contraction, PΔV is negative, w is positive

Chapter 6 Work, Kinetic Energy and Potential Energy

Work, Kinetic Energy and Potential Energy 6.1 The Important Stuﬀ 6.1.1 Kinetic Energy For an object with mass m and speed v, the kinetic energy is deﬁned as K = 1 2 mv2 (6.1) Kinetic energy is a scalar (it has magnitude but no direction); it is always a positive number; and it has SI units of kg · m2/s2. This new combination of the basic ...

The work-energy theorem states that the work done on an ...

How much work does that force do over a distance of 6.0m? Determine if work is done in the following scenarios: A teacher applies a force to a wall and becomes exhausted. A book falls off a table and free falls to the ground. A waiter carries a tray full of meals above his head by one arm straight across the room at constant speed.

Kinetic Energy & The Work-Energy Theorem

Work-Energy Theorem The kinetic energy is dened as K = 1 2 mv2 The work done by the net force on the system equals the change in kinetic energy of the system Wnet = Kf Ki = K This is known as the work-energy theorem Units of K and W are the same (joules) Note: when v is a constant, K = 0 and Wnet = 0, e.g. Uniform circular motion 3

2. Work, Energy and Conservation of Energy – Tutori al 2

2.29 A vertical spring stores 0.962 J in spring potential energy when a 3.0-kg mass is suspended from it. (a) By what multiplicative factor does the spring potential energy change if the mass attached to the spring is doubled? (b) Verify your answer to part (a) by calculating the spring potential energy when a 6.0-kg mass is attached to the spring.

CHAPTER 7:WORK,ENERGY,AND ENERGY RESOURCES

we"can"calculate"the"mass"of"food"required:" (3600 kcal)(0.35) 1260 kcal. (3600 kcal)(0.60) 2160 kcal; and (3600 kcal)(0.05) 180 kcal; fat carbohydrate protein = = = = = = E E E " Now,"from"Table"7.1"we"can"convert the"energy"required"into"the"mass"required" for"each"component of"their"diet:" 135.5 g. 9.3 kcal 1 g 2160 kcal 9.3 kcal 1 g 526.8 g ...

Energy, Work, and

Energy, Work, and Simple Machines CHAPTER Practice Problems 10.1 Energy and Work pages 257–265 page 261 1. Refer to Example Problem 1 to solve the ... m 25 N 226 Solutions Manual Physics: Principles and Problems ... (0.180 kg)(9.80 m/s2)(2.5 m)! 4.4 J 20. Mass A forklift raises a box 1.2 m and

Work-Energy Theorem - sun.iwu.edu

Equation 1 is a statement of the work-energy theorem and is the foundation of much of our science. As such, questions of its validity are certainly worth your consideration. ... In order for the work-energy theorem to have meaning, work (F·d) and kinetic energy (mv2/2) should have the same units. Show that they do.

AP Physics – Work/Energy – 6 ans

AP Physics – Work/Energy – 6 ans 1. A 0.50 kg cart moves on a straight horizontal track. The graph of velocity Vx versus time t for the cart is given below. (a) Indicate every time t for which the cart is at rest.

Chapter 12: Work and Energy - PC|MAC

3. Describe how a lever can increase the force without changing the amount of work being done. 4. Explain why pulleys are in the lever family. 5. Compare the mechanical advantage of a long thin wedge with a short, wide wedge.

L-8 (M-7) I. Collisions II. Work and Energy

5 Example: big fish eats little fish A big fish, M = 5 kg swimming at 1 m/s eats a little fish, m = 1 kg that is at rest. What is the speed of the big fish just after eating the little fish? • The two fishes form a system and their momentum before the “interaction” is the same as their momentum after the “interaction”.

What is the Relationship between Work and Energy?

PH101 Energy: What is the Relationship between Work and Energy? Page 3 of 5 NOTE: The procedure is easier if one person handles the cart and a second person handles data collection in DataStudio. 1. Before taking data, hold the mass up with your hand so that no tension is pulling on the force sensor.

1 Work and Energy - Ms.Park

1 – Work and Energy Example 1 Example 3 – Forces at an angle ... Whenever we use a machine to do work some of the energy we put into the machine is always lost, mainly due to friction. ... however newer vehicles are all built with large crumple zones. Why? A beanbag and a high bounce ball of equal masses are

Chapter 6 – Work and Energy

Kinetic Energy, and the Work Energy Principle Problem 6-36 (textbook): In the high jump, Fran’s kinetic energy is transformed into gravitational potential energy without the aid of a pole.

Work and Energy Chapter 6 Chapter 6 - Work and Energy ...

Work and Energy Chapter 6 ... Chapter 6 - Work and Energy Questions 1. In what ways is the word “work” as used in everyday language the same as it is defined in physics? In what ways is it different? Give examples of both. ... and by the time it has traveled a distance d to point B it is traveling with speed

Kinetic Energy and Work

Problem 17. A helicopter lifts a 72 kg astronaut 15 m vertically from the ocean by means of a cable. The acceleration of the astronaut is g/10. How much work is done on the astronaut by (a) the force from the helicopter and (b0 the gravitational force on her? Just before she reaches the helicopter, what are her (c) kinetic energy and (d) speed?

Chapter 6 –Work and Energy

Problem 6-30 (textbook): A 1.60-m tall person lifts a 2.10-kg book from the ground so it is 2.20 m above the ground. What is the potential energy of the book relative to (a)the ground (b)and the top of the person’s head? (c)How is the work done by the person related to the answers in parts (a) and (b)?

Topic 5: Work and Energy - ed.fnal.gov

Topic 5: Energy Lab – Work Input and Output Energy Purpose: To compare the work input when a car is pulled up an incline to the output energy that is put into the car-earth system. Thus, calculate the energies and efficiencies of the setup. Theory: An inclined plane is one of the six simple machines and input work and output energy

LAB 6: WORK AND ENERGY - University of Virginia

Lab 6 - Work and Energy 91 University of Virginia Physics Department Modified from P. Laws, D. Sokoloff, R. Thornton PHYS 2030, Fall 2010 Supported by National Science Foundation and the U.S. Dept. of Education (FIPSE), 1993-2000 ACTIVITY 1-1: WORK WHEN THE FORCE AND DISPLACEMENT LIE ALONG THE SAME LINE AND WHEN THEY DON’T

Work-Energy Practice Name: Date:

1. The force acting on a particle varies as in the Figure below (The axis is marked in increments of 5.00 m.) x Find the work done by the force as the particle moves across the following distance from = 0 m to . x x = 60.0 m. (90 J) 2. A 2.5 kg object is subject to a force F x that varies with position as in the Figure below. What is the total work

Chapter 7: Work, Energy and Resources W= ( F cos x

3 Work Done by A Variable Force W (Fcos )1 s1 (Fcos )2 s2 Example Problems 8. Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 90.0 kg, down a 60.0oslope at constant speed.

work & energy - ODU - Old Dominion University

work done by several forces (examples 7.3 / 7.4 ) The sled is pulled a distance of 20.0 m by a tractor along level frozen ground. The weight of the sled & its load is 14,700 N. The tractor exerts a constant force of 5000 N at an angle of 36.9° above the horizontal. A constant 3500 N friction force opposes the motion. Find the work done on

15.1 Energy and Its Forms the ability to do work. a ...

15.1 Energy and Its Forms Energy is the ability to do work. Work is actually a transfer of energy. When work is done to an object, energy is transferred to that object. Energy is measured in joules (J) – just like work. Energy can take several different forms. Mechanical Energy is the sum of potential and kinetic energy.

Work and Kinetic Energy Lab - thephysicsaviary.com

Name: Date: Section 2: Factors that Determine the Kinetic Energy of an object The kinetic energy of an object depends on the _____ of the object and the

Conservation of Mechanical Energy; Work

mechanical energy would not remain constant however, since non-conservative forces such as friction are also involved. PROCEDURE I. Conservation of Mechanical Energy A. Using conservation of mechanical energy to predict the change in height, Δh, of a cart traveling up a frictionless ramp and coming to a halt.