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Q.

Statement(A) : Comets move around the sun in elliptical orbits. The gravitational force on the comet due to sun is not normal to the comet's velocity but the work done by the gravitational force over every complete orbit of the comet is zero.

Statement(B) : Gravitational force is a non conservative force

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a

Both A and B are true

b

Both A and B are false

c

A is true, B is false

d

A is false, B is true

answer is C.

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Detailed Solution

Work done over a round trip is zero when there is a conservative force. Here gravitational force is conservative force.

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