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The distance of the centres of moon the ...

The distance of the centres of moon the earth is D. The mass of earth is 81 times the mass of the moon. At what distance from the centre of the earth, the gravitational force on a particle will be zero.

A

`(D)/(2)`

B

`(2D)/(3)`

C

`(4D)/(5)`

D

`(9D)/(10)`

Text Solution

Verified by Experts

The correct Answer is:
D
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MOTION-GRAVITATION-Exercise - 1 (Section - A :- Newtons Law of Gravitation & Gravitational Field, Potential and Potential Energy) 
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  4. A satellite of the earth is revolving in a circular orbit with a unifo...

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  6. Assume that a tunnel is dug through earth from North pole to south pol...

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  7. Mars has a diameter of approximately 0.5 of that of earth, and mass of...

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  8. Three equal masses of 1 kg each are placed at the vertices of an equil...

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  9. One can easily "weigh the earth" by calculating the mass of earth usin...

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  10. A particle falls on earth : (i) from infinity. (ii) from a height 10...

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  11. Two different masses are droped from same heights. When these just str...

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  12. The diagram showing the variation of gravitational potential of earth ...

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  13. Gravitational potential difference between surface of a planet and a p...

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  14. If M(e) is the mass of earth and M(m) is the mass of moon (M(e)=81 M(m...

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  15. The gravitational potential energy is maximum at :

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  16. A missile is launched with a velocity less than the escape velocity. T...

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  17. A body projected from the surface of the earth attains a height equal ...

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  18. The gravitational potential energy of a body at a distance r from the ...

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  19. A particle falls towards the earth from inifinity. The velocity with w...

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  20. A projectile of mass m is thrown vertically up with an initial velocit...

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