Determine the point of application of net force, when forces of 20 N & 30 N are acting on the rod as shown in figure.
70 cm from point A
Net force acting on the rod Fnet = 10N
Net torque acting on the rod about point C
τC = (20 × 0) + (30 × 20) = 600 N-cm clockwise
Let the point of application be at a distance x from point C
600 = 10 x ⇒ x = 60 cm
∴ 70 cm upwards from A is the point of Application of the net force.