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# Universal Law of Gravitation

Write the formula to find the magnitude of the gravitational force between the earth and an object on the surface of the earth.

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#### Solution

Let ME 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=(Gm_1m_2)/r^2

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