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MHT CET Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET

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? [MHTCET 2008]

Answer: (D)

Solution

With constant retardation, gives , and ,

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Question ID VK-039550