Originally Posted by damienlch
View Post
I'm sure you know..
A screw shot has a cue ball which is moving forward and rotating backward, it is sliding and not technically rolling at all.
A stun shot might slide the whole way (center strike), or start with backward rotation (below center strike) which wears off into a slide with no rotation at the moment of impact.
All shots will eventually start to roll "naturally", this "natural" roll is defined as the right amount of forward rotation for the forward speed such that the ball is not sliding, more speed = more rotation, less speed = less rotation, it is the "ground state" for the system, the state for which the lowest amount of energy is expended and therefore the state it converges on without any further outside influence.. it does it naturally so to speak.
I think that's why people say "naturally rolling" and thus "natural angle".
Comment