Angular Momentum and Conservation of Angular Momentum

Question 11:

If torque on a body is zero, then which is conserved

1. force

2. linear momentum

3. angular momentum

4. angular impulse

View Answer

Torque ( $τ) is given by:$
$τ = \frac{d L}{d t}$ where $Lis the angular momentum.$
If $\tau = 0$ , then:
$\frac{dL}{dt} = 0 \Rightarrow L = \text{constant}$ This means angular momentum is conserved.