Question

State Kepler's third law. How did it help to derive gravitational force

Foc - prove it.​

Answer 1

Answer:

Kepler's third law can be derived from Newton's laws of motion and the universal law of gravitation. Set the force of gravity equal to the centripetal force. After substituting an expression for the velocity of the planet, one can obtain: GMr=4πr2P2 which can also be written P2=4π2a3GM.

Answer 2

Answer:

kepler third law:

the square of it's period of revolution around the sun is directly proportional to the cube of the mean distance of a planet from the sun.

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