Question

A rotating fan completes 1200 revolutions every minute. consider the tip of a blade, at a radius of 0.19 m. through what distance does the tip move in one revolution?

Answer 1

The tip of the fan moves through the outer side of the circle.

So it moves a distance of perimeter of circle in one revolution.

Perimeter of circle = 2$\pi$r, where r is the radius of circle.

In this case radius of circular motion = 0.19 meter

So perimeter of circle = 2$\pi$*0.19 = 0.38$\pi$ = 1.194 m

So distance does the tip move in one revolution = 1.194 meter