A ball with a mass of 1.0 kg sits at the top of a 30o incline plane that is 20.0 meters long. If the potential energy of the ball is 98 J at the top of the incline, what is the potential energy once it rolls half way down the incline?

Loading ...

Reveal Answer »

**B.**

Since the height is decreasing, the E_{p} is decreasing and must have a value less than its initial reading 98 J. D is eliminated because its value is higher than the initial E_{p} value. C is eliminated because its value is the same as the initial value of the E_{p}. A is eliminated because the only way to have zero E_{p} is if the body is at ground level. That leaves B as the only option.

**Subscribe below** to receive the MCAT Question of the Day delivered straight to your inbox every morning.