As an object moves from point A to point B only two forces act on it: one force is nonconservative and does -40 J of work, the other force is conservative and does +60 J of work. Between A and B, O A. the potential energy of object increases, mechanical energy increases O B. the potential energy of object decreases, mechanical energy decreases O. the potential energy of object decreases, mechanical energy increases O D. the potential energy of object increases, mechanical energy decreases

As an object moves from point A to point B only two forces act on it: one force is nonconservative and does -40 J of work, the other force is conservative and does +60 J of work. Between A and B, O A. the potential energy of object increases, mechanical energy increases O B. the potential energy of object decreases, mechanical energy decreases O. the potential energy of object decreases, mechanical energy increases O D. the potential energy of object increases, mechanical energy decreases

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 5OQ: Answer yes or no to each of the following questions. (a) Can an objectEarth system have kinetic...

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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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