3. An object has a mass of 7 kg. calculate it potential energy 6m above the ground. а. 411.6J b. 41.16 J c. 4.11 J d. 40.16 J 4. A cart is loaded with a brick and pulled at a constant speed along an inclined plane to the height of a seat top. If the mass of the loaded cart is 3.0 kg and the height of the sea top is 0.45 m, then what is the potential energy of the loaded cart at the height of the seat-top? а. 132.3 J с. 132.3 J b. 1.32 J d. 13.23 J

3. An object has a mass of 7 kg. calculate it potential energy 6m above the ground. а. 411.6J b. 41.16 J c. 4.11 J d. 40.16 J 4. A cart is loaded with a brick and pulled at a constant speed along an inclined plane to the height of a seat top. If the mass of the loaded cart is 3.0 kg and the height of the sea top is 0.45 m, then what is the potential energy of the loaded cart at the height of the seat-top? а. 132.3 J с. 132.3 J b. 1.32 J d. 13.23 J

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter5: Energy

Section: Chapter Questions

Problem 4P: a shopper in a supermarket pushes a cart with a force of 35 N directed at an angle of 25 below the...

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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?
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?