What I am talking here is if you throw each different ball the same way will it's core change the amount of revs you get out of it? Say you have ten different balls with different cores but you throw each one the same. Will some cores give you low revs and other cores give you more revs then other balls? So maybe your rev rate depends on what kind of core is in the ball. Just had this thought recently. What do you folks think?
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The odds are VERY slim that all ten of your balls will result in the same moment of inertia at your PAP.
Using Newtons second law of motion, as it applies to rotating bodies:
torque = moment of inertia * angular acceleration
Using a bit of algebra
angular acceleration = torque / moment of inertia.
If the torque (how you release the ball) remains the same, and the moment of inertia differs from ball to ball, then the angular acceleration will likewise differ from ball to ball.
Last edited by Mike White; 10-30-2016 at 09:50 PM.
Could just be an illusion but I have thrown some balls that while going down the lane looking like they rev very slow as they go down the lane. Then others you can see the revs right off the hand. I also have one ball in particular that almost looks like a knuckle ball going down the lane
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Right handed Stroker, high track ,about 13 degree axis tilt. PAP is located 5 9/16” over 1 3/4” up.Speed ave. about 14 mph at the pins. Medium rev’s.High Game 300, High series 798
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Your rev rate is off your hand. Your ball can get into a roll earlier or later that can have the illusion of having more or fewer revs. Another consideration is slight variances between balls (grips wear out, etc) that can alter your release a little bit, but that's probably not a major variance.
In short, no, it just looks that way.
If the core has no, or minimal impact, on how a ball will rotate, then WHAT DOES IT DO?
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