Q$2)$ In the following figure the rod is fixed in the middle and rotates around the

middle point. The rod has a mass of $12kg.$ The length of the rod $L=3m.$ The

forces affecting the rod are: F$1=6N,F2=9N,F3=12N,F4=24N.$ Find:

a$)$ The net torque of the rod.

b$)$ If the moment of inertia for this rod is $9kg.m^2.$ Find the angular

acceleration of the rod