Induces "deflection" (squirt), where the cue ball deviates from its initial aim line. It also alters the angle of reflection when the ball strikes a cushion. 3. Collision Mechanics The physics of pool/billiards - Evan Kiefl
For those interested in learning more about the science of pocket billiards, here are some PDF resources: Science of Pocket Billiards download pdf
The book provides extensive tables and graphs detailing how friction between the cue ball and object ball causes the object ball to "throw" or deviate from its expected path, especially when using side spin (English). Induces "deflection" (squirt), where the cue ball deviates
It analyzes various types of spin—including inside , outside , draw , and follow —and how they interact with both the object ball and the rail cushions. Collision Mechanics The physics of pool/billiards - Evan
Cut shots are not straight lines. Because of friction between the two balls during the 0.001 seconds of impact, the object ball is "thrown" slightly off the aiming line. Koehler quantifies how spin and speed increase or decrease throw.