If the distance between the centres of Earth and Moon is $D$ and mass of Earth is $81\, times$ that of Moon. At what distance from the centre of Earth gravitational field will be zero?
If the distance between the centres of Earth and Moon is $D$ and mass of Earth is $81\, times$ that of Moon. At what distance from the centre of Earth gravitational field will be zero?
- A
$\frac{D}{2}$
- B
$\frac{2D}{3}$
- C
$\frac{4D}{5}$
- D
$\frac{9D}{10}$
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