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MHT CET Physics question

PhysicsLaws of MotionMHT CET

A particle at rest starts moving with constant angular acceleration '' in circular path. At what time the magnitude of centripetal acceleration is half the tangential acceleration? [MHT-CET 2011, MHT-CET 2011]

Answer: (A),(B)

Solution

, so and ; the condition gives , i.e.

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Question ID VK-041093