Multiple choice

In the example of a soccer ball rolling to a stop, friction acts as __________ that changes the ball’s motion.

  1. An outside force

  2. Momentum

  3. Kinetic energy

  4. A theory

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Friction is an external force that opposes motion. When a ball rolls on the ground, friction acts against the direction of travel, causing the ball to slow down and eventually stop.