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MHT CET Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET

The motor of an engine is rotating about its axis with an angular velocity of . It comes to rest in 15 s, after being switched OFF. Assuming, constant angular deceleration. What are the numbers of revolutions made by it before coming to rest?

Answer: (A)

Solution

rev/s and the average angular speed is , so revolutions =

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Question ID VK-039491