physicists: tip:ball contact time

[Thunderball]

http://www.kamuitips.com/

Don't know who they got hitten balls in some of the vids,but there is some pretty dam sporty shots on that page.

Clicky on the pool table drawing to see the related vid.

 

[av84fun]

Here's another slow speed vid of tip contact.
http://www.kamuitips.com/

Really fun link. But I am highly suspicious that in the demo shots that you click on the pool table diagrams to see, they are using a light CB.

Check out the 3rd one down from top center. I think that few players could get that much masse on a new, standard weight CB.

(-:

 

[Bob Jewett]

... The .09ms came from the link that I provided.
...

Yes, I found it in the text, but it is a mistake. Someone typed 0.09 when they were supposed to type 0.9. There is no other contact time close to that time. The other possibility is that the equipment malfunctioned.

 

[Shortside K]

yawwwwwwn....

The general consensus seems to be that the dwell time of the tip
on the ball is ~1ms (millisecond) or 1/1000 of a second.

This is interesting to me because, in golf, the dwell time is considerably
shorter at ~.5 ms. Yet in that ~.5 ms, while the club is in contact with
the ball, the club has moved the whole way through the ball.

Even in tennis, with a soft ball, the contact time is only ~5 ms.
Croquet, ~1 ms.
In croquet, tests have been done that show a variance in the
contact time upwards of 2ms.
The numbers that I saw were 1.5-3.7 ms. depending upon what type
of stroke was used.

Back to billiards.
Without doing the math, it seems that the tip is in contact with
the ball for the first few inches of the CB:OB journey.
Maybe someone wants to do the math, I don't.

Here's one link with some reference and interesting points about
the physics of croquet vs golf. Link
I'll add another one later.

Wake me up when it gets interesting..........zzzzzzzzzzzzzzzzzzzzzzzz