a rock sitting at the top of a steep hill a tennis ball rolling across the court a picture hanging on the wall a piece of wood before it is burned
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which is the best example of something that has kinetic energy?
Possibilities:
- a rock sitting at the top of a steep hill
- a tennis ball rolling across the court
- a picture hanging on the wall
- a piece of wood before it is burned

a tennis ball rolling across the court