Multiple choice general knowledge science & technology

If a disc is rotating with a angular velocity of w radians per sec. What is the speed of the disc in RPM.

  1. ( 2 x pi x w)/ 60

  2. (60 x w)/(2 x pi)

  3. 2 x pi x w

  4. w x 60
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

To convert from radians per second to RPM, multiply by 60 (to get radians per minute) and divide by 2pi (since one revolution is 2pi radians). RPM = (w × 60) / (2pi). Option A would give radians per hour, while options C and D are incomplete conversions.

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