cue ball does not follow the cue ball deflection line as I expected. What happened?
The cue ball deflection line indicates a path that the cue ball will travel if it has no spin (top, bottom, left or right spin) at the moment of contact. Causing this to occur is very difficult. Many people think that shooting the cue ball easy with a center cue ball stroke will apply no spin. This is not true because the table cloth will apply friction that will cause the ball to have “top spin” (the ball rolls); therefore, the cue ball has top spin at the moment of contact. The cue ball deflection line should be used as a reference line that indicates (on one side or the other) the true path of the cue ball depending on the spin applied (top or bottom). The more “top or bottom” spin applied the further from the cue ball deflection line the true path of the cue ball will be.
