Question

1. which type of energy transformation does not describe potential energy being changed into kinetic energy?

compressing a spring
releasing a stretched rubber band
a ball falling off a shelf
a bike coasting down a hill

Explanation:

• When a spring is compressed, work is done on the spring to store elastic potential energy. It is a process of converting kinetic energy (from the force applied) into potential energy, not the other way around.
• When a stretched rubber band is released, the elastic potential energy in the rubber band is converted into kinetic energy (the motion of the rubber band).
• When a ball falls off a shelf, its gravitational potential energy is converted into kinetic energy (due to its motion as it falls).
• When a bike coasts down a hill, its gravitational potential energy (due to its height on the hill) is converted into kinetic energy (its motion as it goes down the hill).

Answer:

Compressing a spring