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MHT CET Physics question

PhysicsLaws of MotionMHT CET

What should be the velocity of earth due to rotation about its own axis so that the weight at equator becomes of initial value? (Radius of earth on equator = 6400 km, , ) [MHT-CET 2023]

Answer: (A)

Solution

gives , so

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Question ID VK-060308