The 90-Degree Tangent Line Rule: Stun Shot Cue Ball Routing (Aiming Physics)
Quick Summary: The 90-Degree Tangent Line Rule On any cut shot where the cue ball arrives at the object ball with zero forward roll and zero backspin (a true stun shot), the cue ball will depart along a line exactly 90 degrees perpendicular to the object ball’s path. This geometric line is known as the …