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OpenStudy (anonymous):
A 330 kg piano slides down a 28 degrees incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. the effective coefficient of kinetic friction is 0.40. Calculate a) the force exerted by a man, b) the work done by the man on the piano, c)the work done by the friction force, d) work done by the gravity force and e) the net work done please do help meeeee...:(
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