Questions: What Is Friction?

Question 1

Why does a hockey puck slide farther on ice than on carpet?

• A. Ice is colder
• B. Ice has less friction than carpet
• C. The puck is lighter on ice
• D. Carpet has more gravity

Answer: (B)

Ice is a very smooth surface, so there is less friction to slow the puck down compared to rough carpet.

Question 2

Friction can produce heat.

• T. True
• F. False

Answer: True

When two surfaces rub together, friction turns some energy into heat. You can feel this by rubbing your hands together quickly.

Question 3

Give one example of friction being helpful in everyday life.

Model answer: Friction between your shoes and the ground lets you walk without slipping.

Without friction, your feet would slide on the floor and you could not push yourself forward.