Q. 13

A fan rotates at 100 rpm. Find its angular velocity and linear velocity if tip of its blades is 0.20 m away from the axis of rotation.

Answer :

Frequency = ʋ

ʋ = 100 rpm

= 100/60 s-1

= 5/3 Hz(s-1)

Angular velocity = ω

= 2*π*ʋ

= 2 × 3.14 × 5/3

= 10.47rad s-1
r = 0.20m

Linear velocity v = ω*r

= 10.47 × 0.20

= 2.094ms-1

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