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Q.

The earth  mass =6×1024kg revolves around the sun with angular velocity 2×10−7rads−1 in a circular orbit of radius 1.5×1011km. The force exerted by the sun on the earth newton is

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a

Zero

b

18×1025

c

27×1039

d

36×1021

answer is D.

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Detailed Solution

Gravitational force exerted by the sun on the earth will provide required centripetal forceF=mRω2=6×1024×1.5×10112×10−72=36×1021N
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