A Couple two forces equal in magnitude and opposite in direction, acting on an object at two

Question:

A Couple two forces equal in magnitude and opposite in direction, acting on an object at two different points, form what is called a couple. Two ant parallel forces with equal magnitudes F, = F2 = 8.00 N are applied to a rod as shown in Fig. 11.32.
(a) What should the distance I between the forces be if they are to provide a net torque of 6.40 N €¢ m about the left end of the rod?
(b) Is the sense of this torque clockwise or counterclockwise?
(c) Repeat parts (a) and (b) for a pivot at the point on the rod where F 2 is applied

3.00 m