The angular momentum of a particle changes from `4kg m^(2)s^(-1)` to `8kg m^(2)s^(-1)` is `2` seconds. Calcualte the torque acting on the particle

Explanation

`(dL)/(dt)=(8-4)/(2)=(4)/(2)=2Nm`
Hint. `vectau=(dvecL)/(dt)`