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Question

The angular velocity (in rad/s) of a body rotating at N r.p.m. is
  1. πN/60
  2. 2πN/60
  3. πN/120
  4. πN/180

A
πN/60
B
πN/180
C
2πN/60
D
πN/120
Solution
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Angular velocity is defined as the rate of change of angular displacement with respect to time. It is usually expressed by a Greek letter (omega).

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