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Imagine a new planet having the same den...

Imagine a new planet having the same density as that of earth but `3` times bigger than the earth in size. If the acceleration due to gravity on the surface of earth is `g` and that on the new planet is `g'` , then :

A

`g'=3g`

B

`g'=g//9`

C

`g'=9g`

D

`g'=27 g`

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The correct Answer is:
A
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ALLEN -GRAVITATION-EXERCISE 1
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  2. The mass of moon 1% of mass of earth. The ratio of gravitational pull ...

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

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

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

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

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

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

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

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

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

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  12. 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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  13. The gravitational potential energy is maximum at :

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

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

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

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

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

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

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

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