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Question

Two planets of radii r1 and r2 are of the same mass.

The ratio of the acceleration due to gravity g1g2 at the surface of the two planets is:



A

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B

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C

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D

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Solution

The correct option is C


Let, the mass of the planets be "m".
g1 = G × mr12 and g2 = G × mr22
g1g2=r22r12


Physics

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