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A planet in elliptical orbit around a st...

A planet in elliptical orbit around a star moves form the point in its orbit furthest from the star to the closest point. The work done by the force of gravity during this movement is

A

zero

B

positive

C

negative

D

infinite

Text Solution

Verified by Experts

The correct Answer is:
C
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CHHAYA PUBLICATION-NEWTONIAN GRAVITATION AND PLANETARY MOTION-EXERCISE (Multiple choice Questions)
  1. Keeping the mass constant , if the radius of the earth is halved, then...

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  2. The weight of a body on the surface of the earth is W. The weight of t...

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  3. A planet in elliptical orbit around a star moves form the point in its...

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  4. The height of a geostationary satellite from the surface of the earth...

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  5. Two satellite of masses m1 and m2 (m1 gt m2) are revolving around the ...

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  6. Two satellites A and B are revolving along circular paths of the same...

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  7. Two planet are revolving around the sun. their time periods of revolut...

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  8. The centripetal force necessary for an artificial satellite revolving ...

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  9. The radii of the orbits of two satellite A and B revolving around a p...

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  10. In the case of the motion of a planet

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  11. Two small artificial satellite are revolving around the earth in two c...

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  12. If the gravitational force is inversely proportional to the n -th powe...

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  13. A satellite of mass m is revolving around the earth at a height x abov...

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  14. The ratio of the magnitudes of the kinetic energy and the potential en...

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  15. Kepler's second law is the consequence of the law of conservation of

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  16. A satellite is moving in an orbit around a planet with kinetic energy ...

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  17. The angle between the equatorial plane and the orbital plane of a geo-...

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  18. The angle between the equatorial plane and the orbital plane of a pola...

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  19. A geostationary satellite orbits around the earth surface in a circula...

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

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