Calculate the net torque (magnitude and direction) on the beam in Figure P11.5 about (a) an axis through O perpendicular to the page and (b) an axis through C perpendicular to the page where
from figure
t1 = ° , t2 = ° , t3 = ° , a1 = N , a2 = N , a3 = N , b1 = m , b2 = m and b3 = m.