When a ceiling fan is switched off, its angular velocity falls to half while it makes 36…

Physics · JEE Main · NTA ExamsRotational Motion

When a ceiling fan is switched off, its angular velocity
 falls to half while it makes 36 rotations. How many more rotations will it make before coming to rest?
 [Assume constant average angular retardation]
  1. 24
  2. 36
  3. 18
  4. 12

Answer

(D) 12

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