A 300 kg piano slides 4.5 m down a 30 incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (Fig. 6-35)....

A 300 kg piano slides 4.5 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (Fig. 6-35). The effective coefficient of kinetic friction is 0.40.a) The force exerted by the manb) the work done by the man on the pianoc) the work done by the friction forced) the work done by the force of gravitye) the net work done on the piano