Question

1. what is the force that acts upon a rollercoaster after it reaches the top of the hill? a. kinetic energy b. mass c. potential energy d. gravity

Explanation:

Kinetic and potential energy are forms of energy, not forces. Mass is a property of matter, not a force. Gravity is the force that pulls objects towards the center of the Earth and acts on the roller - coaster after it reaches the top of the hill, causing it to move downwards.

Answer:

D. Gravity