Question

Point $C$ is the centre of mass of the rigid body shown in figure. Find the total torque acting on the body about point $C.$

Answer 1

${\tau }_{10N}=0$
${\tau }_{20N}=(20\cos {45}^{\circ }\times 0.1)$ (clockwise)
$=1.414Nm$
${\tau }_{30N}=(30\sin {60}^{\circ }\times 0.05)$ (clockwise)
$=1.299Nm$
$\therefore {\tau }_{Total}=2.71Nm$