When is a torque acting upon a system zero, which of the following will be constant?

Force

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Linear impulse

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Linear momentum

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Angular momentum

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Solution

The correct option is D Angular momentum
Torque $τ = \frac{d L}{d t}$
where $L$ is the angular momentum.
So, $τ = 0$ $⟹ L = c o n s t a n t$
Thus, angular momentum of the system is constant if no external torque is acting on the system.

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Similar questions

{\to τ}_{net} = \to r \times \frac{d {\to P}_{sys}}{d t}

\frac{d {\to P}_{sys}}{d t}

{\to τ}_{avg} = \to r \times \frac{Δ {\to P}_{sys}}{Δ t} = \to r \times \frac{({\to P}_{f} - {\to P}_{i})}{Δ t}

\frac{Δ {\to P}_{sys}}{Δ t}

(Δ t)

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