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A body weighs W newton at the surface of...

A body weighs W newton at the surface of the earth. Its weight at a height equal to half the radius of the earth, will be

A

`W/2`

B

`(2W)/3`

C

`(4W)/9`

D

`W/4`

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The correct Answer is:
C
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ALLEN -GRAVITATION-EXERCISE 1
  1. The change in the value of g at a height h above the surface of the ea...

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

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

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

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

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

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  7. By which curve will be variation of gravitational potential of a hollo...

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

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  9. 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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  10. The gravitational potential energy is maximum at :

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

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  12. A body attains a height equal to the radius of the earth when projecte...

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

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

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

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  16. Two small and heavy spheres, each of mass M, are placed a distance r a...

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  17. An artificial satellite moving in a circular orbit around the earth ha...

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  18. A particle of mass m is moving in a horizontal circle of radius R unde...

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  19. Potential energy of a 3kg body at the surface of a planet is -54 J, th...

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  20. Escape velocity of a body 1 kg mass on a planet is 100 ms^(-1). Gravit...

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