Explain in your own words why a roller coaster has gravitational energy.

Roller coasters are able to move their passengers very rapidly up and down the hills because the cars have a large amount of potential energy on the very first hill. Kinetic Energy is mechanical energy that is due to motion of an object.

It has gravitational pull by it going up, pulling forces. Then it makes it to the top and stays still for a moment. Then it stretches down as it gets pushed down.