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Earn 100

The earth rotates about the sun in an elliptical orbit. At which point will its velocity be maximum?

(a)At
(b)At
(c)At
(d)At

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Important Questions on Gravitation
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Assertion: A body weighs newton on the surface of the earth. Its weight at a height equal to half the radius of the earth will be .
Reason: .

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The gravitational force between two spheres of masses and situated in the air is . Now the space around the masses is filled with a liquid of specific gravity . What will be the gravitational force now?

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Assertion: The artificial satellite does not have any fuel but even then it remains orbiting around the earth.
Reason: The necessary centripetal force required to move the satellite in an orbit around the earth is provided by the gravitational force of attraction between the satellite and the earth.
