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it's a simple v=s/t formula
it calculates the time from release, to the time of first impact. It then calculates the distance divided by the time, and gives you the speed.
there's a few flaws, in that it cant really calculate the release point. I'm assuming it uses pressure sensors of some sort, but alot ofbowlers have a very weak grip on the ball durin the last second of release, and it probably thinks youve released, when it's actually still in hand.
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