Question

True or false? If no external resultant torque acts on a body its angular momentum remains constant.

Answer 1

True.

Explanation:

Torque `tau` is expressed as `(dL)/(dt)`
[Where, L is the angular momentum ]
That means, torque is equals to change in rate of angular momentum.
If, `tau` =0 then `(dL)/(dt)` =0
That means change in rate of angular momentum is zero that is constant.