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A small mass m is moved slowly from the ...

A small mass `m` is moved slowly from the surface of the earth to a height `h` above the surface. The work done (by an external agent) in doing this is

A

(i),(ii)

B

(ii),(iii)

C

(i),(iii),(iv)

D

all

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The correct Answer is:
B
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CP SINGH-GRAVITATION-EXERCISE
  1. In the previous problem, the minimum speed with which the body must be...

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  2. If the acceleration due to gravity at the surface of the earth is g, t...

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  3. A small mass m is moved slowly from the surface of the earth to a heig...

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  4. A particle is projected vertically upwards with a velocity sqrt(gR), w...

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  5. A projectile is projectile with velocity kv(e) in vertically upward di...

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  6. An asteroid of mass m is approaching earth, initially at a distance 10...

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  7. The gravitational force between two objects is proportional to 1//R (a...

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  8. Suppose the gravitational force varies inversely as the nth power of d...

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  9. The distance of two satellites from the surface of the earth R and 7R....

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  10. A satellite is launched into a circular orbit of radius R around the e...

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  11. Two small satellies move in a circular orbits around the earth, at dis...

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  12. The period of a satellite moving in a circular orbit near the surface ...

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  13. The mean radius of the earth is R, its angular speed on its own axis i...

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  14. Two satellites of earth S(1) and S(2) are moving in the same orbit. Th...

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  15. If a satellite orbits as close to the earth's surface as possible,

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  16. In a satellite if the time of revolution is T, then kinetic energy is ...

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  17. To an astronaut is a spcaceship, the sky appears

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  18. A person sitting in a chair in a satellite feels weightless because

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  19. An astronaut orbiting the earth in a circular orbit 120km above the su...

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  20. A geostationary satellite should be launched such that it moves from

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