- A ball is a kind of object
- Rolling is a kind of motion
- Hence, a ball rolling is an example of an object moving

- A ball rolling is an example of an object moving
- Moving changes potential energy into kinetic energy and heat energy
- Therefore, a ball rolling will change the potential energy of the ball into kinetic energy and heat energy

- A ball rolling will change the potential energy of the ball into kinetic energy and heat energy
- Down the hill is a kind of direction
- A metal ball is a kind of ball
- So, a metal ball rolling down the hill will change the potential energy into kinetic energy and heat energy

So, a metal ball rolling down the hill will change the potential energy into kinetic energy and heat energy
[Question]As a heavy metal ball rolls down a hill, it goes faster and faster. Which statement is true?
[Context]- Down the hill is a kind of direction 
- A metal ball is a kind of ball 
- A ball is a kind of object 
- Rolling is a kind of motion 
- Moving changes potential energy into kinetic energy and heat energy