write a formula to find a magnitude of gravitational force
between the earth and an object
on the surface of the earth
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GMm÷rsquare is the magnitude of gravitational force
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Let be the mass of the Earth and m be the mass of an object on its surface. If R is the radius of the Earth, then according to the universal law of gravitation, the gravitational force (F) acting between the Earth and the object is given by the relation:
F = GMEm / R2
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