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Get Full Access to University Physics - 13 Edition - Chapter 6 - Problem 4e
Get Full Access to University Physics - 13 Edition - Chapter 6 - Problem 4e

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# Suppose the worker in Exercise 6.3 pushes downward at an

ISBN: 9780321675460 31

## Solution for problem 4E Chapter 6

University Physics | 13th Edition

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University Physics | 13th Edition

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Problem 4E

Suppose the worker in Exercise 6.3 pushes downward at an angle of 30o below the horizontal. (a) What magnitude of force must the worker apply to move the crate at constant velocity? (b) How much work is done on the crate by this force when the crate is pushed a distance of 4.5 m? (c) How much work is done on the crate by friction during this displacement? (d) How much work is done on the crate by the normal force? By gravity? (e) What is the total work done on the crate? 6.3 . A factory worker pushes a 30.0-kg crate a distance of 4.5 m along a level floor at constant velocity by pushing horizontally on it. The coefficient of kinetic friction between the crate and the floor is 0.25. (a) What magnitude of force must the worker apply? (b) How much work is done on the crate by this force? (c) How much work is done on the crate by friction? (d) How much work is done on the crate by the normal force? By gravity? (e) What is the total work done on the crate?

Step-by-Step Solution:

Solution 4E Step 1 of 8: In the given problem, a crate of mass m=30kg is kept of the horizontal floor with coefficient of kinetic friction k =0.25 is moved by an applied force at an angle 30 0 down the horizontal plane in such a way that, the crate moves at constant velocity. It can be pictorially represented as shown below,

Step 2 of 8

Step 3 of 8

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