A uniform thin rod of mass m and length R is placed normally on the surface of the earth. If the radius of the earth is R and the mass of the earth is M then what is the gravitational force exerted by the earth on the rod?
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a uniform thin rod of mass M and length L is placed normally on the surface of the earth and shops the mass of earth is cm and its radius is R if the magnitude of gravitational force exerted by the Earth on the rod nGMm÷12r×r
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