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why

Asked by mohitgehlot 12th April 2010, 9:30 PM
Answered by Expert
Answer:

Dear student,

the time rate of change of angular momentum of a system of particles is equal to net external torque on the system. This is what is known as Newton's second law in angular form for a system of particles. It, then, follows that the angular momentum of the system will be conserved, if net external torque on the system is zero. Though, there is no external torque on the system, the particles inside the system may still be subjected to forces (torques) and,  therefore, may undergo multiple change in velocity (angular velocity).

Hope this helps.

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Answered by Expert 13th April 2010, 8:01 AM
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