A solid body rotates about a stationary axis accordig to the law `theta=6t-2t^(3)`. Here `theta`, is in radian and `t` in seconds. Find
(a). The mean values of thhe angular velocity and angular acceleration averaged over the time interval between `t=0` and the complete stop.
(b). The angular acceleration at the moment when the body stops.
Hint: if `y=y(t)`. then mean/average value of `y` between `t_(1)` and `t_(2)` is `ltygt=(int_(t_(1))^(t_(2))y(t)dt)/(t_(2)-t_(1))`

Options

A. `1 rad s^(-1)`
B. `2 rad s^(-1)`
C. `3 rad s^(-1)`
D. `4 rad s^(-1)`

Answer

D