Answer:
Potential energy: stored energy (not in motion)
(ie. a plate about to fall off the table)
Kinetic energy: energy in motion
(ie. a moving car)
1. The roller coaster is in motion, thus it is kinetic energy.
2. The ball is in motion, thus it is kinetic energy.
3. The child has already thrown the ball and thus is in motion, so it is kinetic energy.
4. The child is not in motion but is about to swing down. Thus, it is potential energy.
5. The car/truck is rolling down the hill and is in motion. Thus, it is kinetic energy.
6. The spring is not unloaded, and is about to bounce but isn't in motion. Thus, it is potential energy.
