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System of Particles and Rotational Motion
  1. If a flywheel makes 120 revolutions/minute, then its angular speed will be
    1. 8 π rad/sec
    2. 6 π rad/sec
    3. 4 π rad/sec
    4. 2 π rad/s
Correct Option: C

rad/sec

Angular speed, ω =
120 × 2π
 = 4π rad/sec
60


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