Without knowing the angles between the forces and their respective lines OA, OB, and OC, it is impossible to calculate the net torque about point O.
If you have this information, you can use the formula:
torque = force * distance * cos(angle)
and add up the torques for FA, FB, and FC to find the net torque about point O.
A body is pivoted at a Point O. Three forces act on it in the directions shown on the figure. FA = 11 N at point A, 8.0 m from O. FB = 15 N at point B, 4.0 m from O. FC = 20 N at point C, 3.0 m from O. What is the net torque about point O?
You have to also have the direction of the force as measured from the line OA, or OB, or OC.
torque= force*distance*cosANGLE between them.
1 answer
1 answer