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Question
What is the source of centripetal force that a planet requires to revolve around the Sun? On what factors does that force depend?
Answer in Brief
Solution
A planet requires centripetal force to revolve around the sun which is provided by the gravitational force of the sun on the planet.
As F = `"G"("M"_"s""M"_"p")/"r"^2`
the force depends on the mass of the sun (Ms), the mass of the planet (MP) and the distance between the two (r).
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