Answer to Question #95221 in Physics for Anony

Question

A roller coaster cart with a mass of 200kg is going through a few hills. point A is at the bottom of the track in the beginning. point B is at the top of the first hill at 120 m high. Point C is at the bottom of the first hill. Point D is on a second smaller hill at 80 m high. How much work is done by the chain pulling the cart from point A to point B with 1960 Newtons of force?

Answer 1

$$W_{BA}=mg(h_B-h_A)$$

$$W_{BA}=(200)(9.8)(120)=235200\ J=235.2\ kJ$$