If the radius of an object undergoing uniform circular motion is doubled, the centripetal force will
A) remain the same.
B) increase by a factor of 2.
C) increase by a factor of 4.
D) decrease by a factor of 2.

Question

Quizplus · Accepted Answer

The centripetal force is inversely proportional to the radius (F = mv^2/r), so if the radius is doubled, the force decreases by a factor of 2.

If the Radius of an Object Undergoing Uniform Circular Motion