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-   -   Kershaw doesn't stop (https://forum.officiating.com/baseball/101705-kershaw-doesnt-stop.html)

Forest Ump Mon Oct 17, 2016 09:55am
Quote:
Originally Posted by CoachPaul (Post 991619)
If there is a change in direction of the hands, and that change if direction occurs in the same spot each time, it can be predicted and ceases to be deceptive. I have then discerned there was a stop. If minimum duration of time mattered greatly, there would be a time mentioned in the rules.
"ceases to be deceptive" has nothing to do with calling a balk. That's not mentioned in the rules.

Rich Ives Mon Oct 17, 2016 11:43am
Quote:
Originally Posted by CoachPaul (Post 991619)
If there is a change in direction of the hands, and that change if direction occurs in the same spot each time, it can be predicted and ceases to be deceptive.
Most pitchers stop in the same spot every time. It would mess up their mechanics if they altered it.

What they do is alter the elapsed time of the stop. This keeps theor mechanics the same but keeps the runner on his toes.

Mark T. DeNucci, Sr. Tue Oct 18, 2016 06:29am
Quote:
Originally Posted by CoachPaul (Post 991615)
In physics, a stop is mandatory for any change of direction. It's impossible to change directions without a momentary stop. Momentum is zero, even if for a micro second.

Coach Paul:

One cannot make the statement that: "It's impossible [for an object] to change directions without a momentary stop." Circular motion is an excellent example of an object changing direction without stopping.

MTD, Sr.

Mbilica Tue Oct 18, 2016 06:41am
Quote:
Originally Posted by Mark T. DeNucci, Sr. (Post 992000)
Coach Paul:

One cannot make the statement that: "It's impossible [for an object] to change directions without a momentary stop." Circular motion is an excellent example of an object changing direction without stopping.

MTD, Sr.
I agree. It would be more accurate scientifically to say that an object cannot reverse direction without stopping. Stopping is only necessary in 1 dimension situations. Along each dimension, objects stop before changing direction even in circular motion (look at the horizontal and vertical components of circular motion). Of course, athletes move in 3 dimensions, so the statement that they can't change direction without stopping is incorrect.

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