A spool of wire rests on a horizontal surface as shown in figure. As the wire is pulled, the spool does not slip at contact point P. On separate trials, each one of the forces $F_1$ , $F_2$  , $F_3$  and $F_4$  is applied to the spool. For each one of these, the frictional force on the spool will be towards 

Point of contact P is at rest. Taking torque of all the forces about point P we see that:
Torque is clockwise if F1 is applied i.e., spool will rotate clockwise.
Torque of F2 is zero i.e., spool will not rotate if F2 is applied.
Torque of F3= and F4= is anticlockwise i.e., spool will rotate anticlockwise if only F3 and F4 is applied.