If a spinning object's radius shrinks by a factor of 5, its rotation velocity will
A) get five times faster.
B) get five times slower.
C) remain the same.
D) get 10 times faster.
E) get 25 times faster.

Question

Quizplus · Accepted Answer

According to the conservation of angular momentum, if the radius of a spinning object decreases, its rotational velocity increases proportionally. If the radius shrinks by a factor of 5, the rotational velocity increases by a factor of 5.

If a Spinning Object's Radius Shrinks by a Factor of 5