90 N F Example 4.1 30° 30 kg A person pulls a 30 kg crate 10 m across a level floor using a rope that is 30° above horizontal. The person exerts a force of 90 N on the rope. (a) How much work is done by the person? (b) If the coefficient of friction between the crate and the floor is 0.1, how much work is done by the friction? (c) What is the work done by the gravitational force? (d) What is the net work done on the crate?

90 N F Example 4.1 30° 30 kg A person pulls a 30 kg crate 10 m across a level floor using a rope that is 30° above horizontal. The person exerts a force of 90 N on the rope. (a) How much work is done by the person? (b) If the coefficient of friction between the crate and the floor is 0.1, how much work is done by the friction? (c) What is the work done by the gravitational force? (d) What is the net work done on the crate?

Name: 90 NFExample 4.130°30 kgA person pulls a 30 kg crate 10 m across a le
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Description: 90 NFExample 4.130°30 kgA person pulls a 30 kg crate 10 m across a level floor using a ropethat is 30° above horizontal. The person exerts a force of 90 N onthe rope.(a) How much work is done by the person?(b) If the coefficient of friction between

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter7: Work, Energy, And Energy Resources

Section: Chapter Questions

Problem 8PE: Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 90.0 kg, down a 60.0°...

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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?