Well, maybe, but I think an iron-loaded cue ball and synchronized electromagnets is more likely.
Artistic shots billiards.. this time violating the laws of physics
- Thread starter MartinvanRhee
- Start date
Another unlikely but possible explanation is remotely activated, motor-driven flywheels and brakes inside the CB.
I look forward to hearing a more-reasonable explanation. It would also be interesting to see if anybody else is able to execute any of these shots with standard equipment.
Excellent video! Very thought provoking!
Regards,
Dave
I misread this first time around....
..I thought it said "POSSESSION rotates the spin......:shocked2::shocked2:
Well, yes, just like in the Exorcist. Demonic possession.
Well, no. Everyone else who shoots masse shots uses right side spin when making the cue ball curve to the right prior to hitting a cushion. Further, the handedness of the spin (left or right) cannot change without hitting a cushion. Look at the sequence of events for each shot. There is something very, very special going on.
Not to take anything away from the OP those were some nice shots but judging by the comments it just sounded like you guys are not familiar with Sayginer.
https://youtu.be/HwRMiSEYUt4?t=40s
https://youtu.be/KMkOPDRfGro?t=10m59s
https://youtu.be/HwRMiSEYUt4?t=40s
https://youtu.be/KMkOPDRfGro?t=10m59s
As with all Semih shots, those are very impressive. However, I did not see anything in those shots that seemingly violates basic pool-physics common sense like the shots in Martin's video.
Regards,
Dave
As the ball "takes" an arc, the forces on the ball are not balanced and the spin axis precesses. After the ball straightens out, the spin axis quits precessing. This guy has the timing down so that the CB hits a rail just as the spin axis gets to the right pointing vector.
The "resultant" spin axis does change as a shot unfolds, but the top/bottom spin, masse spin, and sidespin components can be thought of as totally independent. The top/bottom and masse spin components change radically during the shots in question, due to the sliding friction at the base of the ball (which creates torques about the horizontal axes). However, the sidespin component remains nearly constant until the CB hits a cushion (because there is very little resistance to sidespin, and the sliding friction creates no torque about the vertical axis). FYI, these effects are illustrated visually fairly clearly in the following video:
NV B.10 - Drag spin loss and sidespin persistence, with spin-axis "flip"
And for those with strong physics/math backgrounds, detailed analyses showing how spin components evolve during a shot, and how they affect ball trajectories, can be found here:
TP A.4 - Post-impact cue ball trajectory for any cut angle, speed, and spin
TP B.2 - Rolling resistance, spin resistance, and "ball turn"
Enjoy,
Dave
So you're saying that the first shot is "basic physics"?
I don't think Dr. Dave's comment is meant to take anything away from the shot. It is like saying what happens during 12 holes in one in a row can be explained using physics, while no one has ever accomplished that feat before.
There is a lot going on in that first shot, including a lot of skidding and and extreme spin which holds for an incredible amount of time. All depending on a lot more skill than I have, but Dr. Dave is saying that what is happening in that first shot can be explained using physics. The masse doesn't take effect until the end of the shot.
We just can't seem to explain what is causing the cue ball to act the way it is in Martin's videos.
Well stated.
I would add that Semih's shots are probably not possible on typical pool equipment. Either the cloth he is playing on is extremely slick and/or the ball is polished or Silicon-sprayed to allow it to retain the spin that long.
Again, Semih's shots are truly amazing ... but the action of the ball off each rail makes sense (based on the expected spin on the ball based on the direction of the masse curve).
Martin's shots are also amazing, but the spin direction on the rails seems to violate the spin direction required to create the masse curves (i.e., the shots seemingly violate basic pool-physics understanding).
Again, awesome thought-provoking video,
Dave
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Me too. Although, even the slo-mo video feature on a modern smart phone would probably be suitable.
I look forward to hearing or figuring out what the "secret" is.
Regards,
Dave
So far as I know, the spin around the vertical axis on a billiard ball has never reversed without hitting the cushion or another ball.
There is a fifth dimension beyond that which is known to man. It is a dimension as vast as space and as timeless as infinity. It is the middle ground between light and shadow, between science and superstition, and it lies between the pit of man's fears and the summit of his knowledge. This is the dimension of imagination.
It is an area which we call... The Twilight Zone. 
Isn't the Carom ball just a measles ball with out spots? Just asking, they have the same mass and such to my knowledge.
I get what you're saying but what I was trying to accomplish was not done, unfortunately. My point was that I have seen him do the same things with the ball as Martin did and just felt that maybe no one had really remembered Semih as he was not mentioned, now the actual clip where he performs the shots have been taken down as I spent a good 20 mins looking for it, the one in particular is similar to the second shot where he shoots a 6 rail shot using only a quarter of the table. Me posting those two "mostly the second" is that it was the closest i could find to it and figured other would look at his other shots where he performs those Physics defying shots.