Roll one ball toward another, and see what happens when they collide. Place a glass of water in the freezer, and see how long the water takes to become solid. Compress a spring by different amounts, and see how far it can launch a ball into the air. Roll a ball from the top of an inclined plane and determine the amount of time it takes to get to the bottom.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which investigation might be used to demonstrate potential energy?
Possibilities:
- Roll one ball toward another, and see what happens when they collide.
- Place a glass of water in the freezer, and see how long the water takes to become solid.
- Compress a spring by different amounts, and see how far it can launch a ball into the air.
- Roll a ball from the top of an inclined plane and determine the amount of time it takes to get to the bottom.

Compress a spring by different amounts, and see how far it can launch a ball into the air.