Question

A motor pulls an 800 kg roller coaster train to the top of a 70 m hill. What is the change in the potential energy of the cars?

Answer 1

548800J

Step-by-step explanation:

Given parameters:

Mass of roller coaster = 800kg

Height of hill = 70m

Unknown:

Change in potential energy = ?

Solution:

The change in potential energy is the difference between the potential energy at the bottom and at the top.

Potential energy at the bottom is 0J

So;

Change in potential energy = mgh - 0

m is the mass, g is the acceleration, h is the height

Change in potential energy = 800 x 9.8 x 70 = 548800J