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How much energy must be spent to pull th...

How much energy must be spent to pull the satellite in Q. No. 304 out of the earth's gravitational field?
(If the earth shrink suddenly to half its present size.)

A

`(GmM)/(2(R+h)^(2))`

B

`(GmM)/(4(R+h)^(2))`

C

`(GmM)/(2(R+h))`

D

`(GmM)/(4(R+h))`

Text Solution

Verified by Experts

The correct Answer is:
c
`r_(1)=h_(1)+(R)/(2)+(R)/(2)`
`r_(1)=h_(1)+R`
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NIKITA PUBLICATION-GRAVITATION-Multiple Choice Questions
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  2. How much energy must be spent to pull the satellite in Q. No. 304 out ...

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  3. How much energy must be spent to pull the satellite in Q. No. 304 out ...

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  4. For two saatellitw at distance R and 7R above the earth's surface, the...

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  5. A satellite is orbiting the earth in a circular orbit of radius r. Its

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  6. The potential energy os a body of mass 100 kg is circulating in orbit ...

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  7. The total energy of the body is

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  8. A satellite circles a planet of unknown mass in circular orbit of radi...

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  9. If B.E. of a satellite of mass 1000 kg is 10^(6)J, then B.E. of anothe...

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  10. If the weight of a body is 100 N, on the surface of the earth then its...

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  11. If the ratio of weight of two bodies is 2:3 then the ratio of their B....

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  12. The kinetic energy needed to project a body of mass m from the earth's...

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  13. The gravitational potential energy of a rocket of mass 100 kg at a di...

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  14. A body of mass m rises to a height h=R//5 from the earth's surface whe...

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  15. What is the percentage change in the value of g as we shift from equat...

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  16. How much energy will be necessary for making a body of 500 kg escape f...

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  17. A satellite of mass 'm' is revolving in an orbit of radius 2 R. The mi...

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  18. The kinetic energy needed to project a body of mass m from the surface...

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  19. The ratio of the K.E. required to the given to the satellite to escape...

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  20. The work done to remove a body of mass 10 kg from the surface of the e...

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