# Boy + bus

1. Aug 25, 2004

### 7bear

A boy travels by bus. When it goes up a mountain, does the boy inside the bus gain in P.E.? Vice versa, does he loss in P.E. when the bus goes down?

2. Aug 25, 2004

### jcsd

Yes he gains G.P.E. as we can simply think of his G.P.E. as a function of his distance from the centre of the Earth.

3. Aug 25, 2004

$$P_e = mgh$$