OUTSTANDING visualization! Thank you for putting so much effort into this. Models and visualization/intuitive-understanding help so much. Hit a million balls and I guess I’ll get there eventually, but to me, understanding what I’m seeing (and allowing me to predict) shortens the process considerably.
Exactly how I see it! Understanding what's going on "under the hood" doesn't eliminate practice or playing by feel. But it should shorten the learning curve. And "cracking the code" makes the whole process more fun & worthwhile (IMO FWIW).
THIS is an amazing video!!!! Thank you so much for breaking it down. I've looked for quite a while on the Internet and a bunch of pool books trying to find this info to no avail. I even bought the Coriolis book but I can't understand it. Thank you so much!
Work on Part 2 is underway. But, with all the detail and graphics modeling, these videos take a long time. Please be patient! ⏳ Thanks for your interest.
The only time the middle (center) of the cue ball strikes the object ball (to enter a pocket) is if the cue ball and object ball are exactly straight in-line with the pocket. All shots (not straight in) - the cue ball needs to strike the object ball at some point between the dead center and the 90-degree angle around the left or right side of the cue ball. Draw a straight line between the object ball and the (center of) the pocket. Then without changing the angle of the stick - move the stick to the center of the cue ball. The point, then, exactly under the stick's-center-line and the cue ball is the point on the cue ball that will strike the object ball (on a pocketed attempt). This will be true with all shots on the table. A ' ghost ' ball placed touching the object ball pointing a straight line to the center of the pocket (or what cheating the pocket is applied) will show just where the ' line of the stick ' must be directed (aimed). Much of the time that line is entirely missing the object ball. A possible technique then might be, to actually line-up the cue-stick to miss the point on the object ball by the distance-difference from that point on the object ball - that was transferred back to the cueball. Albert.
can you explain how spin affect the cue ball path with soft/medium force and BHE? for example I often use outside spin BHE a tip left of center to make the cue ball goes "thinner", it works well but I don't really understand why
It could be that some swerve is sending the cue ball to the thin side of the object ball. It could be that your BHE aim is sending it thin. But without knowing more about your shot and why it "works well", these are just guesses, because... This is an example of the ultimate question that we're all trying to answer when it comes to side spin shots! It opens the sidespin "can of worms", invoking all the effects at play in a sidespin shot: deflection, aim compensation, pivots and NPL, cue elevation, shot speed, swerve, CIT, SIT. My videos are slowly working through all these effects (Part 2 will get into swerve). For the big picture I would refer you to Dr. Dave's RUclips channel and website; see links in description. But again, it's a can of worms! Suggestion: try to understand each effect independently before trying to figure out how they all work together.
Could you please do the analasys on 3 cushions. Especially reverse spin when you hit the cushion against its natural path? We love to see how it really works. Thank you. Nice videos too.
The visuals on this are great. I do feel like every real-world shot swerves, though if you strike firmly enough the swerve isn't a factor. We're seeing that swerve in your bottom left example, at 13:58. Which may be confusing to people, after all this talk about "how can the ball go straight when shooting with side?" and the ball seems to visually curve. The physics you're giving seem sound, I just feel like in the real world we're never using 100% level cue, the butt is elevated enough to clear the rail, also to permit hitting low on the cue ball, since nobody wants to swing with their knuckles sliding across the cloth.
You win the prize! I knew this would come up because I too saw what looks like a curve in that shot. And you are correct that nearly all shots swerve to some degree (as I say at the beginning of the video) because the cue is almost never completely level. These issues will be addressed in Part 2 (not uploaded yet) . I just wanted to get through the basics in Part 1 first. However, I don't think the apparent curve in that shot is swerve. Swerve only happens during sliding, and at that slow shot speed any sliding is minimal and terminates quickly. Instead, it looks like "turn" to me. Dr. Dave has good information on ball "turn"; see link in the description. It could just be public pool hall table idiosyncrasies too! In conclusion, these two videos are about swerve, but balls can curve for other reasons too.
I don't play snooker. But I should think if you hit a snooker ball with sidespin using a completely level cue, it won't curve, different cloth notwithstanding. At least it won't curve due to swerve (which will be discussed in Part 2); it may curve due to cloth irregularities, ball deformities, and something called "turn", but that can happen on a pool table as well. I'm certainly open to correction. Thanks for watching.
@@IOnianStreams There are some videos that explain snooker nap effect. For right side, "with the nap", the cue ball curve to right. While "against the nap" the cue ball curve to left!
@@bjbjup Thanks. Something called "turn" on a pool table may be a similar phenomenon. Dr Dave has good info on "turn"; see link in the description. I've tried to limit these 2 videos just to swerve, but balls can curve for other reasons too.
@@IOnianStreams Snooker table green baize: all the hairs are curved. "With the nap", all the hairs point forword. "Against the nap", all the hairs point backward. That is why the cue ball with side will go curve, and not the same in opposite direction. On a pool table, there is no "with" or "against" the nap.
ENTIENDO QUE ESTÁ LA OPCIÓN DE LOS SUBTITULOS , PERO ESTARÍA BUENO QUE ALGUIEN LO TRADUJERA AL CASTELLANO DIRECTAMENTE. MIRANDO LAS IMÁGENES , TE PERDÉS EL MOVIMIENTO DE LAS BOLAS. Y VICEVERSA.
This video is about spin, not about deflection or aim compensation. I therefore use parallel shift to simplify the context. See my other "Demystifying" videos for details on cue pivot shifts. (BTW, parallel shift is sometimes appropriate.)
You lost me at "rolling resistance is a kind of friction." If you can't get freshman level physics right I'mma have a hard time taking you seriously in a video allegedly about the physics of billiards. (hint: account for material deformation then decompose the force vectors. One of them points in the "friction" like direction, but it aint friction doing it.)
I haven't lost you at all. You clearly get it! From Shephard: "Consider the rolling ball at a microscopic level. The nature of the EFFECTIVE FRICTIONAL FORCE arises in part from the compression of the cloth fibers as the ball rolls past. Once compressed, they do not rebound immediately as the ball passes; if they did, then there would be no energy lost in this manner by the rolling ball. The energy lost by this irreversible compression of the fibers slows the rolling ball." [Caps added] If you don't like my use of the term "friction" to describe rolling resistance, you're welcome to replace it with Shephard's term "effective frictional force" or your term "friction-like" force. Regardless of the semantics, there is no material change to our practical understanding of the phenomenon -- the ball rolls to a stop! Thanks for watching.
@@IOnianStreams Wait, you mean Shephard of Shepard's online? Sorry, when I said freshman physics I meant university freshman physics for engineers, not web bases physics for home schooled ding-dongs. So, step one, draw a free body diagram. Note first that the weight of the ball deforms the cloths such that the ball rolls in a little (circular) "ditch". Now add in your force vectors and you'll see that the ball is effectively rolling "uphill" the entire time. The force vector that slows the ball sure looks like a friction vector (points in the same direction), but calling it "effective friction" doesn't make it friction. The ball slows because material deformation causes it to continuously roll uphill. Full stop.
@@rawdonholt6745without a doubt, and is also only half right as rolling resistance or rolling friction is a misnomer, but also generally considered perfectly acceptable terms to describe the energy lost due to deformation. Has a chip on his shoulder for some reason 😅
![I.N "HALLUCINATION" | [Stray Kids : SKZ-PLAYER]](http://i.ytimg.com/vi/n5B5q1Hwt_U/mqdefault.jpg)
OUTSTANDING visualization! Thank you for putting so much effort into this. Models and visualization/intuitive-understanding help so much. Hit a million balls and I guess I’ll get there eventually, but to me, understanding what I’m seeing (and allowing me to predict) shortens the process considerably.
Exactly how I see it! Understanding what's going on "under the hood" doesn't eliminate practice or playing by feel. But it should shorten the learning curve. And "cracking the code" makes the whole process more fun & worthwhile (IMO FWIW).
Simply awesome!! ❤❤❤
This is freaking awesome
I'm impressed the details of animation editin
THIS is an amazing video!!!! Thank you so much for breaking it down. I've looked for quite a while on the Internet and a bunch of pool books trying to find this info to no avail. I even bought the Coriolis book but I can't understand it. Thank you so much!
You are amazing sir. Thank you so much. And it would be best if you could drop some videos about How to aim with side spin.
Any idea when part 2 will be released? I really want to understand the part about where the deflection ends and the swerve starts. I cannot wait.
Work on Part 2 is underway. But, with all the detail and graphics modeling, these videos take a long time. Please be patient! ⏳ Thanks for your interest.
@@IOnianStreamsawesome video sir
Can you make a video on how to know what part of the cue ball will touch to the object ball when shooting?
See my "Cut Shot Visualization" video, ruclips.net/video/9e08beFM-ik/видео.html
The only time the middle (center) of the cue ball strikes the object ball (to enter a pocket) is if the cue ball and object ball are exactly straight in-line with the pocket.
All shots (not straight in) - the cue ball needs to strike the object ball at some point between the dead center and the 90-degree angle around the left or right side of the cue ball.
Draw a straight line between the object ball and the (center of) the pocket. Then without changing the angle of the stick - move the stick to the center of the cue ball. The point, then, exactly under the stick's-center-line and the cue ball is the point on the cue ball that will strike the object ball (on a pocketed attempt). This will be true with all shots on the table. A ' ghost ' ball placed touching the object ball pointing a straight line to the center of the pocket (or what cheating the pocket is applied) will show just where the ' line of the stick ' must be directed (aimed). Much of the time that line is entirely missing the object ball. A possible technique then might be, to actually line-up the cue-stick to miss the point on the object ball by the distance-difference from that point on the object ball - that was transferred back to the cueball. Albert.
can you explain how spin affect the cue ball path with soft/medium force and BHE? for example I often use outside spin BHE a tip left of center to make the cue ball goes "thinner", it works well but I don't really understand why
It could be that some swerve is sending the cue ball to the thin side of the object ball. It could be that your BHE aim is sending it thin. But without knowing more about your shot and why it "works well", these are just guesses, because...
This is an example of the ultimate question that we're all trying to answer when it comes to side spin shots! It opens the sidespin "can of worms", invoking all the effects at play in a sidespin shot: deflection, aim compensation, pivots and NPL, cue elevation, shot speed, swerve, CIT, SIT. My videos are slowly working through all these effects (Part 2 will get into swerve). For the big picture I would refer you to Dr. Dave's RUclips channel and website; see links in description. But again, it's a can of worms! Suggestion: try to understand each effect independently before trying to figure out how they all work together.
Could you please do the analasys on 3 cushions. Especially reverse spin when you hit the cushion against its natural path? We love to see how it really works. Thank you. Nice videos too.
Good idea. But difficult -- ball/cushion interactions are very complex.
The visuals on this are great. I do feel like every real-world shot swerves, though if you strike firmly enough the swerve isn't a factor. We're seeing that swerve in your bottom left example, at 13:58. Which may be confusing to people, after all this talk about "how can the ball go straight when shooting with side?" and the ball seems to visually curve. The physics you're giving seem sound, I just feel like in the real world we're never using 100% level cue, the butt is elevated enough to clear the rail, also to permit hitting low on the cue ball, since nobody wants to swing with their knuckles sliding across the cloth.
You win the prize! I knew this would come up because I too saw what looks like a curve in that shot. And you are correct that nearly all shots swerve to some degree (as I say at the beginning of the video) because the cue is almost never completely level. These issues will be addressed in Part 2 (not uploaded yet) . I just wanted to get through the basics in Part 1 first. However, I don't think the apparent curve in that shot is swerve. Swerve only happens during sliding, and at that slow shot speed any sliding is minimal and terminates quickly. Instead, it looks like "turn" to me. Dr. Dave has good information on ball "turn"; see link in the description. It could just be public pool hall table idiosyncrasies too! In conclusion, these two videos are about swerve, but balls can curve for other reasons too.
For snooker, side spin creates a curved line.
Snooker cloth is different from the cloth on a pool table.
I don't play snooker. But I should think if you hit a snooker ball with sidespin using a completely level cue, it won't curve, different cloth notwithstanding. At least it won't curve due to swerve (which will be discussed in Part 2); it may curve due to cloth irregularities, ball deformities, and something called "turn", but that can happen on a pool table as well. I'm certainly open to correction. Thanks for watching.
@IOnianStreams Search for nap effect snooker..It will curve.
@@IOnianStreams There are some videos that explain snooker nap effect.
For right side, "with the nap", the cue ball curve to right. While "against the nap" the cue ball curve to left!
@@bjbjup Thanks. Something called "turn" on a pool table may be a similar phenomenon. Dr Dave has good info on "turn"; see link in the description. I've tried to limit these 2 videos just to swerve, but balls can curve for other reasons too.
@@IOnianStreams Snooker table green baize: all the hairs are curved.
"With the nap", all the hairs point forword.
"Against the nap", all the hairs point backward.
That is why the cue ball with side will go curve, and not the same in opposite direction.
On a pool table, there is no "with" or "against" the nap.
ENTIENDO QUE ESTÁ LA OPCIÓN DE LOS SUBTITULOS , PERO ESTARÍA BUENO QUE ALGUIEN LO TRADUJERA AL CASTELLANO DIRECTAMENTE.
MIRANDO LAS IMÁGENES , TE PERDÉS EL MOVIMIENTO DE LAS BOLAS.
Y VICEVERSA.
Sí, sería bueno. Quizás lo traduzca yo algún día. Grácias por mirar el video.
Parallel shift is terrible nobody, I know is it
This video is about spin, not about deflection or aim compensation. I therefore use parallel shift to simplify the context. See my other "Demystifying" videos for details on cue pivot shifts. (BTW, parallel shift is sometimes appropriate.)
You lost me at "rolling resistance is a kind of friction." If you can't get freshman level physics right I'mma have a hard time taking you seriously in a video allegedly about the physics of billiards. (hint: account for material deformation then decompose the force vectors. One of them points in the "friction" like direction, but it aint friction doing it.)
I haven't lost you at all. You clearly get it!
From Shephard: "Consider the rolling ball at a microscopic level. The nature of the EFFECTIVE FRICTIONAL FORCE arises in part from the compression of the cloth fibers as the ball rolls past. Once compressed, they do not rebound immediately as the ball passes; if they did, then there would be no energy lost in this manner by the rolling ball. The energy lost by this irreversible compression of the fibers slows the rolling ball." [Caps added]
If you don't like my use of the term "friction" to describe rolling resistance, you're welcome to replace it with Shephard's term "effective frictional force" or your term "friction-like" force. Regardless of the semantics, there is no material change to our practical understanding of the phenomenon -- the ball rolls to a stop! Thanks for watching.
@@IOnianStreams Wait, you mean Shephard of Shepard's online?
Sorry, when I said freshman physics I meant university freshman physics for engineers, not web bases physics for home schooled ding-dongs. So, step one, draw a free body diagram. Note first that the weight of the ball deforms the cloths such that the ball rolls in a little (circular) "ditch". Now add in your force vectors and you'll see that the ball is effectively rolling "uphill" the entire time. The force vector that slows the ball sure looks like a friction vector (points in the same direction), but calling it "effective friction" doesn't make it friction. The ball slows because material deformation causes it to continuously roll uphill. Full stop.
Excellent explanation. You should make a video.
@@davehobwestyou seem like a massive tool.
@@rawdonholt6745without a doubt, and is also only half right as rolling resistance or rolling friction is a misnomer, but also generally considered perfectly acceptable terms to describe the energy lost due to deformation. Has a chip on his shoulder for some reason 😅
Robot voices suck.
Yeah, I know. Hopefully the quality of the content makes up for it. (Life could be worse! :-()