The torque applied to a ring revolving about its own axis so as to change its angular momentum by 2 J-s. in 5 s, is

Options

A. `10N-m`
B. `2.5 N-m`
C. `0.1 N-m`
D. `0.4 N-m`

Explanation

`tau = (Delta L )/( Delta t) = (2)/(5) = 0. 4 N m`