Mini-Quiz: Friction Overview

1. What is a problem caused from friction?

   It takes more effort to move thingsThat is correct. You know about friction. It helps you hold onto a pencilSorry, not correct. Try another button. It makes item slideGood try, but not right. Select another answer.

2. What causes friction?

   The coefficient of frictionOops! Wrong answer. Re-read the question and try again. Molecular adhesion, surface roughness, and deformationsCorrect. You are doing great! No one knows for sureSorry, not correct. Try another button.

3. What are the modes of friction?

   Sliding, rolling, and fluidOops! Wrong answer. Re-read the question and try again. Static, kinetic, rolling, and fluidGood try, but not right. Select another answer. Static and kineticThat is correct. You know about friction.

Pick an answer to see instant feedback. Re-read the lesson if you miss one.