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The gravitation force between two object...

The gravitation force between two objects is F. How will the force change when the distance between them is reduced to `1/4th?`

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When the distance is reduced to `1/4th`
`F.=G (Mm)/((1/4 d)^(2))=16G (Mm)/(d^(2))=16F`
The force between the two objects becomes 16 times.
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