As you say, changing the amount of force applied changes both the CB's spin and its speed - and it's this combination of spin and speed (the spin/speed ratio) that matters in pool - not the RPMs alone, but the revolutions per distance of travel. That spin/speed ratio only changes with tip distance from centerball.
pj
chgo
Only if how hard you hit and the force going to cueball is the same, that is the variable here we are talking about not how far off center you hit. In order to measure the affect the material of the shaft has on the hit we need to use a constant tip placement of course, so that won't change.
The post asked if wood type changed how the cue or shaft played and how one would know. The answer would be that if the wood happened to transfer more force to the cueball you would get more action out of the shot at the same speed, but I don't see how you can find out if that is the case till after the shaft is built with any sort of accuracy. We are not talking about how hard exactly the player hits the ball, but how much of that energy reaches the ball, that difference is the equipment. Unless we assume that the exact same measure of newtons reaches the cueball as the muscles put out, which I'm sure no-one would agree with since there is energy lost in the swing needed to move the cuestick and energy lost at impact. It's that lost energy at impact we need to look at to see how the shaft material affects the cueball.
One of the biggest things is physics is "for every action there is an equal and opposite reaction". When we hit the cueball, the cueball hits us. If that hit back is absorbed more, the force into the cueball is less. If the material does not absorb the impact as much, more force goes to the cueball. That is the variable of the shaft and cue material, that amount of energy that is lost from muscle to the ball. I know there is more than one engineer / scientist on here, I'm sure they can put out the math that will show this. If it's meaningful or not in a game, maybe, maybe not, but all that affect the hit feel and why some shafts feel deader than others.
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