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  • What is the source of centripetal force that a planet requires to revolve around the Sun? On what factors does that force depend?

What is the source of centripetal force that a planet requires to revolve around the Sun? On what factors does that force depend?

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When any particle performs circular motion, the centripetal force is required to change the direction of the velocity.

This force always acts towards the centre of the circle.

The centripetal force that a planet requires to revolve around the sun is given by gravitational force between sun and planet.

By the universal law of gravitation, this force will be proportional to mass of the planet and inversely proportional to the square of separation of planet from the sun.

Gravitational force between them will be given as:

F= \frac{Gm_{1}m_{2}}{r^{2}}

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