Multiple choice

Which of the following objects does not use rolling friction?

  1. Bicycle

  2. Scooter

  3. Car

  4. A rock on a hill

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

Rolling friction occurs when round objects (wheels, balls) roll on surfaces - bicycles, scooters, and cars all use wheels. A rock on a hill experiences static or sliding friction, not rolling friction, as it slides rather than rolls.