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Physics

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A box of mass 250 kg slides 4.6 m down an inclined plane of 31°. Jim pushes against the box to keep it from accelerating. The coefficient of kinetic friction between the box and the ramp is 0.41
(a) Calculate the magnitude of the force exerted by Jim.

(b) Calculate the work done by Jim on the box.

(c) Calculate the work done by the force of friction.

(d) What is the work done by the force of gravity?

(e) What is the net work done on the box?

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