A baby carriage is sitting at the top of a hill that is 21 m high. The carriage with the baby has a mass of 5kg whats the energy the carriage has?

The first thing you should remember is that the energy in this case will be given by the work done.

The work is defined as:

W = F * d

Where

F = Force

d = displacement.

Calculate it.

5 kg x 9.8 m / s ^ 2 x 21 m = 1029 J