The mass of the moon is 1/81 of the earth but the gravitational pull is 1/6 of the earth. It is due to the fact that

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The radius of the moon is 81/6 of the earth

The radius of the earth is 9/6 of the moon

Moon is the satellite of the earth

None of the above

answer is B.

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Detailed Solution

Gravitational pull depends upon the acceleration due to gravity on that planet.∴ Mm=181Me,gm=16geg=GmR2⇒ReRm=MeMm×gmge1/2=81×161/2Re=96Rm