Freezing cue ball to the unbroken rack

[jjr183]

I've seen slow motion video of the CB hitting an OB and then following the tangent line exactly regardless of the amount of spin on the CB.
...
All the years I've been playing I've never known english to change the path of the cue ball off of an object ball.
MULLY

I may have been a little misleading in what I was trying to say. I agree that the cue ball will definitely still go down the tangent line. I am just saying that the spin on the cue ball affects the speed at which it starts going down it. This in turn affects how quickly any follow/draw will take effect; inside will shorten the distance along the tangent line before bending and outside will lengthen it.

 

[CueAndMe]

I would say any sideways movement from english would be the spin catching on the fibers of the table and because the ball is moving extremely slow.

That's an interesting thought. Maybe hitting two balls on a slippery surface will prove or disprove that.
I always thought of the throw effect as two balls meshing into one another like stripped gears. If one ball is being thrown, both had to be thrown.

 

[mullyman]

I may have been a little misleading in what I was trying to say. I agree that the cue ball will definitely still go down the tangent line. I am just saying that the spin on the cue ball affects the speed at which it starts going down it. This in turn affects how quickly any follow/draw will take effect; inside will shorten the distance along the tangent line before bending and outside will lengthen it.

Interesting, I was always under the impression the distance the CB took on the tangent line before any draw or follow took over was in direct proportion to how hard or soft you stroke it.......I guess which should be read as how much speed is on the CB......which is what you are saying too now that I see it in print......I just never thought about the CB picking up speed off of the OB like it does off of the cushion. Interesting, very interesting. Do we have any technical data on this one?
MULLY

 

[mullyman]

That's an interesting thought. Maybe hitting two balls on a slippery surface will prove or disprove that.
I always thought of the throw effect as two balls meshing into one another like stripped gears. If one ball is being thrown, both had to be thrown.

You know, to be honest, I never thought about throw from spin having an effect on the CB. I mean, there are times when I'll use throw and cheat the pocket to keep from scratching or getting position that seems impossible but I never consciously thought about the CB getting thrown any. Now I have to wonder if the throw on the CB is enough of a factor that I should concern myself with it.
MULLY
loving this site more and more every day

 

[CueAndMe]

I wonder if the following experiment would show anything:
Have a helper spin an object ball as fast as they can in place and then stroke a stop shot with a cueball into that object ball while it's spinning. If the cueball veers off center would that tell us anything? Just an idea.

 

[mullyman]

I wonder if the following experiment would show anything:
Have a helper spin an object ball as fast as they can in place and then stroke a stop shot with a cueball into that object ball while it's spinning. If the cueball veers off center would that tell us anything? Just an idea.

Well, in that situation I would say yes, the CB would definitely veer off, but there's a variable there that we'll never have, the OB already spinning at the time of contact. But, what if both balls were spinning in the same direction? And what if the CB was spinning really fast and the OB was spinning really slow and vice versa? Very, very interesting. Anyone have access to one of those super high speed cameras?
MULLY
I could do it with my cell phone but I don't think it would show any conclusive evidence

 

[CueAndMe]

But, what if both balls were spinning in the same direction? And what if the CB was spinning really fast and the OB was spinning really slow and vice versa?

Now my head is spinning.

 

[Bob Jewett]

I wonder if the following experiment would show anything:
Have a helper spin an object ball as fast as they can in place and then stroke a stop shot with a cueball into that object ball while it's spinning. If the cueball veers off center would that tell us anything? Just an idea.

As Wayland Marlow pointed out to us, you do not want a ball spinning as fast as possible to generate the maximum frictional force on another ball. Instead, you want it spinning just fast enough so that when the balls separate, the surfaces will just be turning together without slipping. Dr. Dave has discussed this in some of his articles. This fact is very important if you want to "twist" a bank in -- it makes a big difference in when you should add side spin.