Roy pulls a box of mass 19.7 kilograms across a horizontal floor by exerting a force of 96.4 newtons at an angle of 20.5 degrees. The coefficient of kinetic friction between the box and the floor is 0.385, and Roy pulls the box 14.0 meters. a. What work does Roy do? b. What work does friction do? c. What is the net work done on the box?

College Physics
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ISBN:9781305952300
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Chapter5: Energy
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Problem 40P: (a) A block with a mass m is pulled along a horizontal surface for a distance x by a constant force...
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Roy pulls a box of mass 19.7 kilograms across a horizontal floor by exerting a force of 96.4 newtons at an angle of 20.5 degrees. The coefficient of kinetic friction between the box and the floor is 0.385, and Roy pulls the box 14.0 meters.

 

a. What work does Roy do?

b. What work does friction do?

c. What is the net work done on the box?

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