Question

A ventilation fan has blades 0.25 m long rotating at 20 rpm. What is the centripetal acceleration of a point on the outer tip of a blade?

Answer 1

20rpm = 20 x 2π / 60
=2.1 rad/s

angular speed, ω=2.1 rad/s

v=rω
v=(0.25)(2.1)
= 0.525m/s

centripetal acceleration, ac = v2 /r
= (0.525)2/(0.25)
=1.10m/s2

Answer 2

Nice 1 m8

Answer 3

1.1 m/s2