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प्रश्न
Write an expression for the force due to gravity on a body of mass m and explain the meaning of symbols used in it.
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उत्तर
The force due to gravity on a body of mass m kept on the surface of Earth (mass=M and radius=R) is equal to the force of attraction between the Earth and that body.
`"F" = "GMm"/"R"^2`
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