In which of the following examples is potential energy changing into kinetic energy?
A.
A bicyclist coasts down a hill.
B.
A bicyclist puts on the brakes.
C.
A ball stops rolling.
D.
A ball rolls uphill.
D all of the others explain how the object or person begins to stop which means the energy was kinetic. Therefore a ball rolling up a hill starts at a potential energy point causing kinetic energy once it rolls up hill
