Question

A point P moves around a circle of r = 1ft at 20rpm (rotations per minute). Find the linear velocity (to the nearest feet per minute)?

Answer 1

`126` feet per minute

Explanation:

.

The perimeter of the circle is:

`P=2pir=2pi(1)=2pi` feet

The point moves around the circle at `20` rpm. i.e.:

`2pi(20)=40pi=126` feet per minute