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The value of 'g' reduces to half of its ...

The value of 'g' reduces to half of its value at surface of earth at a height 'h', then :-

A

`h=R`

B

`h=2 R`

C

`h=(sqrt(2)+1)R`

D

`h=(sqrt(2)-1)R`

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The correct Answer is:
D
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ALLEN -GRAVITATION-EXERCISE 1
  1. Acceleration due to gravity at the centre of the earth is :-

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  2. The value of 'g' on earth surface depends :-

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  3. The value of 'g' reduces to half of its value at surface of earth at a...

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  4. The acceleration due to gravity on a planet is 1.96 ms^(-1). If it is ...

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  5. If the earth stops rotating sudenly, the value of g at a place other t...

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  6. Diameter and mass of a planet is double that earth. Then time period o...

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  7. Gravitation on moon is (1)/(6) th of that on earth. When a balloon fil...

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  8. The acceleration due to gravity g and mean density of earth rho are re...

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  9. Will 1 kg sugar be more at poles or at the equator?

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  10. When you move from equator to pole, the value of acceleration due to g...

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  11. When the radius of earth is reduced by 1% without changing the mass, t...

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  12. Weight of a body of mass m decreases by 1% when it is raised to height...

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  13. Acceleration due to gravity at earth's surface if 'g' m//s^(2). Find t...

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  14. The mass of moon 1% of mass of earth. The ratio of gravitational pull ...

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  15. Imagine a new planet having the same density as that of earth but 3 ti...

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  16. The change in the value of g at a height h above the surface of the ea...

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  17. If the speed of rotation of earth about its axis increases, then the w...

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  18. A body weighs W newton at the surface of the earth. Its weight at a he...

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  19. The imaginary angular velocity of the earth for which the effective ac...

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

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