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MHT CET Physics question

PhysicsLaws of MotionMHT CET

What should be the angular speed of earth in radian/second so that a body of 5 kg weights zero at the equator? [Take and radius of earth = 6400 km]

Answer: (B)

Solution

Weight is zero when : \sqrt{\dfrac{10}{6.4×10^6}}10^{-3}\dfrac$1

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Question ID VK-060014