A trapeze artist, starting from rest, swings downward on the bar, lets go at the bottom of the swing, and falls freely to the net. An assistant, standing on the same platform as the trapeze artist, jumps from rest straight downward. Friction and air resistance are negligible.

Question

A trapeze artist, starting from rest, swings downward on the bar, lets go at the bottom of the swing, and falls freely to the net. An assistant, standing on the same platform as the trapeze artist, jumps from rest straight downward. Friction and air resistance are negligible.
(a) On which person, if either, does gravity do the greatest amount of work? 
*trapeze artist 
*the person with more mass     
*assistant 
(b) Who, if either, strikes the net with a greater speed? 
*trapeze artist 
*assistant     
*neither