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Offline Centres

Mass of the earth is 81 times that of the moon. If the distance between their centers is d, then the point on the line joining their centers at which the gravitational field due to them is zero is

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$\frac{d}{10}$ from the center of moon

$\frac{d}{10}$ from the center of earth

$\frac{9 d}{10}$ from the center of moon

$\frac{d}{2}$ from each other

answer is A.

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Detailed Solution

$x = \frac{d}{\sqrt{\frac{m_{2}}{m_{1}}} + 1} = \frac{d}{10}$ from moon

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