As we study that it is gravitational force between the sun and the earth which keeps the earth in uniform circular motion around the Sun.
But according to Kepler's second law of motion is planet revolves around the sun in such a way that the line joining the planet to the sun Swift's over equal area in equal interval of time.here planet moves faster when it close to the sun and slower when it far away from the sun.Then how planet is in uniform motion?
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hola mate.....here is your answer....
actually it was a very good question.....thanks for asking it....
When we consider the uniform motion of earth around the sun , we imagine that the earth is revolving in a circular path which is practically illogical because earth always revolves in an elliptical orbit around sun.......it is same as true fr other planets too..
but when we consider the path of planets as elliptical orbit , we hv to apply Kepler's law rather than Newtonian mechanics......so for an elliptical orbit revolution , the speed or angular velocity changes at apogee and perigee positions....
when we consider the revolution orbit as a circular path , we take angular velocity as a constant factor which is only to apply Newtonian mechanics....there is no practical proof of circular orbit of planets around the sun because they move in an elliptical orbit....
hope u understood ^_^
actually it was a very good question.....thanks for asking it....
When we consider the uniform motion of earth around the sun , we imagine that the earth is revolving in a circular path which is practically illogical because earth always revolves in an elliptical orbit around sun.......it is same as true fr other planets too..
but when we consider the path of planets as elliptical orbit , we hv to apply Kepler's law rather than Newtonian mechanics......so for an elliptical orbit revolution , the speed or angular velocity changes at apogee and perigee positions....
when we consider the revolution orbit as a circular path , we take angular velocity as a constant factor which is only to apply Newtonian mechanics....there is no practical proof of circular orbit of planets around the sun because they move in an elliptical orbit....
hope u understood ^_^
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