A 5.0-kg block that initially has a speed of 6.0 m/s is moving in a straight line on a level surface where there is kinetic friction between the block and the surface. What is the magnitude of the work done by the frictional force after the block comes to rest? Answers: a, 210 J b. 120 J c. 150 J d. 90 J e. 180 J

A 5.0-kg block that initially has a speed of 6.0 m/s is moving in a straight line on a level surface where there is kinetic friction between the block and the surface. What is the magnitude of the work done by the frictional force after the block comes to rest? Answers: a, 210 J b. 120 J c. 150 J d. 90 J e. 180 J

Name: Question 23A 5.0-kg block that initially has a speed of 6.0 m/s is mo
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Description: Question 23A 5.0-kg block that initially has a speed of 6.0 m/s is moving in a straight line on a level surface where there is kinetic friction betweenthe block and the surface. What is the magnitude of the work done by the frictional force after th

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter7: Conservation Of Energy

Section: Chapter Questions

Problem 6P: A block of mass m = 5.00 kg is released from point and slides on the frictionless track shown in...

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Alex and John are loading identical cabinets onto a truck. Alex lifts his cabinet straight up from the ground to the bed of the truck, whereas John slides his cabinet up a rough ramp to the truck. Which statement is correct about the work done on the cabinet-Earth system? (a) Alex and John do the same amount of work, (b) Alex does more work than John, (c) John does more work than Alex, (d) None of those statements is necessarily true because the force of friction is unknown, (e) None of those statements is necessarily true because the angle of the incline is unknown.
a shopper in a supermarket pushes a cart with a force of 35 N directed at an angle of 25 below the horizontal. The force is just sufficient to overcome various frictional forces, so the cart moves at constant speed, (a) Find the work done by the shopper as she moves down a 50.0-m length aisle, (b) What is the net work done on the cart? Why? (c) The shopper goes down the next aisle, pushing horizontally and maintaining the same speed as before. If the work done by frictional forces doesnt change, would the shoppers applied force be larger, smaller, or the same? What about the work done on the cart by the shopper?
a shopper in a supermarket pushes a cart with a force of 35 N directed at an angle of 25 below the horizontal. The force is just sufficient to overcome various frictional forces, so the cart moves at constant speed, (a) Find the work done by the shopper as she moves down a 50.0-m length aisle, (b) What is the net work done on the cart? Why? (c) The shopper goes down the next aisle, pushing horizontally and maintaining the same speed as before. If the work done by frictional forces doesnt change, would the shoppers applied force be larger, smaller, or the same? What about the work done on the cart by the shopper?
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(a) Suppose a constant force acts on an object. The force does not vary with time or with the position or the velocity of the object. Start with the general definition for work done by a force W=ifFdr and show that the force is conservative, (b) As a special case, suppose the force F =(3i + 4j)N acts on a particle that moves from O to in Figure P7.43. Calculate the work done by F on the particle as it moves along each one of the three paths shown in the figure and show that the work done along the three paths identical.
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