Question

When net external tarque on a acting body is zero then which is conserve?

Answer 1

Answer:

When the torque acting upon a system is zero, the angular momentum is constant and hence is conserved. This is analogous to the linear counterpart i.e. when the force on the system is zero, the momentum is conserved

Answer 2

Answer:

when net external torque acting on a body is Zero then the angular momentum is Constant and also conserved

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