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Select the correct alternative-...

Select the correct alternative-

A

(a)The gravitational field inside a sperical cavity, within a spherical planet must be non zero and uniform.

B

(b) When a body is projected horizontally at an appreciable large height above the earth, with a velocity less than for a circular orbit, it will fall to the earth along a parabolic path.

C

(c) A body of zero total mechanical energy placed in a gravitational field will escape the field

D

(d) earth's satellite must be in equatorial plane

Text Solution

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The correct Answer is:
C
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ALLEN -GRAVITATION-Exercise 2 (Brain Teasers)
  1. There is a concentric hole of radius R in a solid sphere of radius 2R....

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  2. If there were a smaller gravitational effect, which of the following f...

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  3. Select the correct alternative-

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  4. A particle of mass M is at a distance a from surface of a thin spheric...

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  5. Three particles are projected vertically upward from a point on the su...

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  6. When a satellite in a circular orbit around the earth enters the atmos...

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  7. A satellite is to be geo-stationary, which of the following are essent...

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  8. A cavity of radius R//2 is made inside a solid sphere of radius R. The...

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  9. A tunnel is dug along a chord of the earth at a perpendicular distance...

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  10. A double star is a system of two stars of masses m and 2m, rotating ab...

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  11. A solid sphere of uniform density and radius 4 units is located with i...

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  12. The magnitude of the gravitational field at distance r(1) and r(2) fro...

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  13. Mark the correct statement/s-:

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  14. Calculate the gravitational potential at the centre of base of a solid...

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  15. Suppose a smooth tunnel is dug along a straight line joining two point...

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  16. A small ball of mass 'm' is released at a height 'R' above the earth s...

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  17. A particle of mass m was transferred from the centre of the base of a ...

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  18. If d is the distance between the centre of the earth of mass M(1) and ...

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  19. A planet is revolving around the Sun in an elliptical orbit. Its close...

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  20. A satellite is in a circular orbit very close to the surface of a plan...

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