A spool of thread on a horizontal surface may roll without slipping if someone pulls it by the free end of the thread. The spool may roll toward or away from the person who pulls the free end of the thread depending on the direction of the applied force.
[Figure: Side view of spool with thread]
Sketch a side-view diagram of the spool of thread on the horizontal surface which shows the direction of the force applied to the free end of the thread in such a way that this force does not cause the rolling of the spool in either direction. The force belongs to the plane of the drawing.