A football is kicked off a tee. A baseball player slides into second base. A floating stick is carried over a waterfall. A bicycle travels faster as it goes downhill.
Newton's first law of motion states that an object at rest will stay at rest unless acted upon by an outside force. Which activity is an example of this law?

Options:
- A football is kicked off a tee.
- A baseball player slides into second base.
- A floating stick is carried over a waterfall.
- A bicycle travels faster as it goes downhill.

A football is kicked off a tee.