Total angular momentum of a rotating body remains constant,, if the net torque acting on the body is:

Question

Total angular momentum of a rotating body remains constant,, if the net torque acting on the body is: (A) zero (B) maximum (C) minimum (D) unity

Tardigrade Admin · Accepted Answer

From law of conservation of angular momentum, when no external torque acts on a rotating body, then the total angular momentum of the body remains constant.
That is, If

τ = \frac{dJ}{d t} = 0

\Rightarrow J = I ω =

constant
where

I

is moment of inertia and cd is angular velocity.

Q. Total angular momentum of a rotating body remains constant,, if the net torque acting on the body is:

zero

maximum

minimum

unity

From law of conservation of angular momentum, when no external torque acts on a rotating body, then the total angular momentum of the body remains constant. That is, If τ=dtdJ​=0 ⇒J=Iω= constant where I is moment of inertia and cd is angular velocity.

From law of conservation of angular momentum, when no external torque acts on a rotating body, then the total angular momentum of the body remains constant.
That is, If $τ = \frac{dJ}{d t} = 0$
$\Rightarrow J = I ω =$ constant
where $I$ is moment of inertia and cd is angular velocity.