### What is the change in kinetic energy of the box

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A force of 210N is applied to a 50.0 kg box. The force is directed 20 degree above the horizontal. The coefficient of kinetic friction between the box and the floor is 0.25 and the box moves 3.00m across the horizontal floor. A) How much work is done by the applied force? B) Compute the work done by the frictional force C) What is the change in kinetic energy of the box?

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