A dentist's drill is used to fix problems with your teeth. Suppose that a doctor increases the angular speed of his drill from 0.12 rev/s to 1.15 rev/s. What is the average angular speed of the drill?

Answer 1

The average angular speed is the average of the initial and final angular speeds.

average angular speed = (0.12 rev/s + 1.15 rev/s)/2

= 0.635 rev/s

Therefore, the average angular speed of the drill is 0.635 rev/s.