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A rocket is fired from the earth. The bo...

A rocket is fired from the earth. The body is projected the distance between the earth of the moon is r & the mass of the earth is 81 times the mass of the moon. The gravitational force on the rocket will be zero, when its from the moon is

A

`r/5`

B

`r/10`

C

`r/15`

D

`r/20`

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The correct Answer is:
A
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