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Question

What is the angular velocity (in rad/s) of a fly wheel making 300 r.p.m?
  1. 30
  2. 600π
  3. 10π
  4. 20π


Solution

The correct option is C 10π
We know that,
 angular velocity in r.p.m (revolution per minute (N)) and radians per second (ω) are related by
ω=2πN60=300×2π60=10π rad/s

(1 revolution corresponds to 2π radians)

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