2. at the very bottom of the track, what type of energy is greatest?
2. at the very bottom of the track, what type of energy is greatest?
Answer
Explanation:
Step1: Recall energy - types
At the bottom of a track, potential energy due to height is minimum. Kinetic energy $K = \frac{1}{2}mv^{2}$ and potential energy $U = mgh$ are the main forms of mechanical energy considered here. As the height $h$ is minimum at the bottom, potential energy is low.
Step2: Analyze kinetic - energy
As an object moves down the track, its potential energy is converted into kinetic energy. At the very bottom of the track, all (or most, ignoring friction) of the initial potential energy has been converted into kinetic energy. So, kinetic energy is the greatest at the bottom of the track.
Answer:
Kinetic energy