Question

A 67.8 kg skier is at rest at the top of a 376 m high run. The slope is inclined at a 23.4º angle relative to horizontal. Assuming that there is no friction between the skis and the snow, how much potential energy does the skier have when he/she reaches the bottom of the hill?

Answer 1

The potential energy the skier have when he/she reaches the bottom of the hill is zero, because all energy converts to kinetic energy at this point:

$$E_p=mgh=mg(0)=0\ J$$