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The ratio of escape velocity at earth to...

The ratio of escape velocity at earth to the escape velocity at a planet whose radius and mean density are twice as that of earth is

A

`1:2`

B

`1:2sqrt(2)`

C

`1:4`

D

`1:sqrt(2)`

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-GRAVITATIONAL-EXERCISE-2
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  4. A satellite is revolving in a circular orbit round the earth at a heig...

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  8. A spaceship is launched into a circular orbit of radius R close to the...

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  9. The escape velocity for a body projected vertically upwards from the s...

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  10. The mass of a planet is half that of the earth and the radius of plane...

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  11. The escape velcoties on the surface of two planets of masses m(1) and ...

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  12. If the escape velocity on earth is 11.2kms^(-1) its value for a planet...

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  13. The radius in kilometers to which the presence radius of the earth (R ...

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  14. A planet revolving round the sun. Its distance from the sun at apogge ...

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  15. Polar satellites go round the poles of earth in

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  16. A point P lies on the axis of a ring of mass M and radius a, at a dist...

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  17. At what height from the surface of earth the gravitational potential a...

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  18. The ratio of escape velocity at earth to the escape velocity at a plan...

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