A broken clothes drier with a mass of 128 kg is hurled from a cliff 12.6 m high with an initial velocity of 14.5 m/s, directed at an angle of 39.8° above the horizontal.
a) How much work is done on the drier by its own weight during its fall from the cliff to the ground?
b) What change in the gravitational potential energy of the clothes drier takes place during the fall?
c) If the gravitational potential energy at the top of the cliff is assumed to be zero, what is its value when the clothes drier crashes into the ground?