Mini-Quiz: Types of Friction

1. What is an example of sliding friction?

   Static friction is greater than kinetic frictionThat is correct. You are becoming a Champion in friction. Kinetic friction is greater than the static frictionSorry, not correct. Try another button. Sliding friction is less than rolling frictionGood try, but not right. Select another answer.

2. What is an advantage of using rollers instead of sliding an object?

   Rollers are much less expensiveOops! Wrong answer. Re-read the question and try again. Rolling friction is much less than sliding frictionCorrect. You sure are smart. Rolling friction has the advantage of being greater than sliding frictionSorry, not correct. Try another button.

3. Why is it easier to move water through a hose than grease through a hose?

   Since grease is slippery, it actually moves easier than waterOops! Wrong answer. Re-read the question and try again. Water has less viscosity than grease and thus has less fluid frictionThat is correct. You are becoming a Champion in friction. Because you would never move grease through a hose in the first placeGood try, but not right. Select another answer.

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