QUESTION $9$

A prosthetic knee joint must achieve an angular velocity of $2ra\frac{d}{s}$ to mimic natural gait. If the moment of inertia of the prosthetic limb segment is $0\mathrm{.}5kg{m}^2,$ what torque is required to accelerate the joint from rest to $2ra\frac{d}{s}$ in $1$ s $?$

$$

$-1$

$1$

$-2$