Potential Energy of a Rollercoaster At a particular point on a track (call it Position A), a rollercoaster ( m = 120 kg m=120kg) is at a height of 32 m 32m above the ground. The track drops steeply down to a height of 5.2 m 5.2m above the ground, rises to 26 m 26m above the ground, then drops again to a height of 15 m 15m above the ground at Position B. From Position A to B, the rollercoaster covers a distance of 430 m 430m. What is the change in gravitational potential energy (in Joules) of the rollercoaster from Position A to B?