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RPM or revolution per minute is the unit of _________
1. angular momentum
2. angular acceleration
3. angular displacement
4. angular velocity

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Correct Answer - Option 4 : angular velocity

CONCEPT:

  • Angular velocity (ω): How fast the angular position or orientation of an object changes with time or How fast an object rotates or revolves relative to another point is known as angular velocity.
    • Angular velocity in terms of RPM (revolutions per minute) 

ω = 2 π f / 60

where ω is in terms of radian per second and f is in revolution per minute.

EXPLANATION:

  • 'Revolutions per minute' is the unit of angular velocity.
  • 'Revolutions per minute' shows the rate of change of revolutions or How fast an object rotates i.e. angular velocity.
  • So the correct answer is option 4.

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