Answer: The athlete will have same mechanical energy at the bottom of the hill.
Explanation:
Mechanical energy is defined as the sum of the potential energy and kinetic energy that is used to do work. Mechanical energy of an object cannot be created nor be destroyed. It can be transformed from one form to another.
M.E= P.E+K.E
The mechanical of the energy of an athlete on skate board on the top of the hill was 'X' joules.
When she reached the bottom of the hill, the mechanical energy of her remained constant. During this process the potential energy from the initial point got transformed into the kinetic energy at final point by which the mechanical energy remained constant.
