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Grade: 12th pass

                        

Angular momentum. why moment of inertia increases of earth near sun. And how no torque is acting on earth in presence of suns gravitational force.

3 years ago

Answers : (1)

Rudra
14 Points
							According to Keplers Law of areas of planetary motion- " The line joining the sun and a planet sweeps out equal areas in equal interval of time". dA/dt= constant.That is the areal velocity is costant .Now, L= MVR where M and R for a planet is fixed now when V becomes constant L too becomes constand and from the relation dL/dt = Troque.We get d(constant)/dt=0 Therefore torque=0.Moment of inertia of a planet is given by C/(M(R^2)) Where C is polar moment of inertia when it is closer to earth R decreases hence Moment of inertia increases.
						
3 years ago
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