Mini-Quiz: Centripetal Force

1. What can happen if the centripetal force is perpendicular to the direction of motion?

   The object can stop movingSorry, not correct. Try another button. You cannot apply a force perpendicular to the line of motionGood try, but not right. Select another answer. The object can follow a circular pathThat's correct. You understand forces.

2. What is the centripetal force when the Moon travels around the Earth?

   There is no centripetal force, since there is no wire or rope connecting themOops! Wrong answer. Re-read the question and try again. No one knows for sureSorry, not correct. Try another button. The gravitational force between the Earth and the MoonCorrect answer. You know about centripetal force.

3. From the centripetal force equation, happens when the straight-line velocity of an object is doubled?

   The centripetal force must be four times as greatThat's correct. You understand forces. The velocity is too fast for centripetal force workGood try, but not right. Select another answer. The mass of the object decreases by one-halfOops! Wrong answer. Re-read the question and try again.

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