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A person pushes a 400.0 kg couch 10.5 m up a 15.0 ̊ incline at a...

A person pushes a 400.0 kg couch 10.5 m up a 15.0 ̊ incline at a constant velocity. The person pushes the couch against friction, which has a kinetic friction coefficient of 0.40. A. What is the is the force exerted by the person? B. What is the work done on the couch by the person? C. What is the work done on the couch by the force of gravity? D. What is the work done on the couch by friction? E. What is the net work done on the couch?

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