what determines the cue ball speed?

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giulichajari

AzB Silver Member
Silver Member
A friend told me..if you shot quickly (moving the cue quickly), the white ball speed will be more, on the other hand, slowly will be less?

Is certain? or which is the fact which determines the speed of the cue ball?
 
A couple of different factors will determine cue ball speed.

Some one else can chime in with the exact formula.

1. The speed of the accelerating cue stick at time of contact plus about 10%.
2. How close to dead center the cue ball was struck at.
3. The angle of the cue stick at time of contact.

Then the cue ball immediately starts to slow down as it travels to it's target.


randyg
 
giulichajari said:
A friend told me..if you shot quickly (moving the cue quickly), the white ball speed will be more, on the other hand, slowly will be less?

Is certain? or which is the fact which determines the speed of the cue ball?
Click to expand...

Whether the cuestick is accelerating at impact doesn't matter. What matters is its speed and its mass.

Typically a stick is around 18oz and a ball is around 6oz. The speed of both the stick and the ball after the collision is determined by conservation of kinetic energy, which is approximate but pretty good, and conservation of momentum, which is exact.

What you will find is that the stick slows down to about half its original speed and the ball takes off at about one and a half times the original speed of the stick
 
giulichajari said:
A friend told me..if you shot quickly (moving the cue quickly), the white ball speed will be more, on the other hand, slowly will be less?

Is certain? or which is the fact which determines the speed of the cue ball?
Click to expand...

Context of the question is a little vague. Are you implying that with the pool you have played that you have never varied the speed of your cue?
 
You should discuss ths aspect of shooting pool with Scott Lee.

The velocity of your cue stroke & follow are really important considerations.
 
goettlicher said:
A couple of different factors will determine cue ball speed.

Some one else can chime in with the exact formula.

1. The speed of the accelerating cue stick at time of contact plus about 10%.
2. How close to dead center the cue ball was struck at.
3. The angle of the cue stick at time of contact.

Then the cue ball immediately starts to slow down as it travels to it's target.


randyg
Click to expand...

Obviously the angle between the cue ball and the object ball is important..

Close to center is slower than up or down?
 
giulichajari said:
A friend told me..if you shot quickly (moving the cue quickly), the white ball speed will be more, on the other hand, slowly will be less?

Is certain? or which is the fact which determines the speed of the cue ball?
Click to expand...
See what Mike Page said above. That is correct if the cue stick hits the middle of the cue ball and describes the speed of the cue ball immediately after it leaves the cue tip. The speed of the cue ball is directly proportional to the speed of the stick. Move the stick faster and the cue ball will move faster.

If the cue stick hits the cue ball off-center, then the cue ball will have less speed initially. After the cue ball leaves the tip it may be slowed because it is rubbing on cloth and gradually picking up forward spin. If you hit the cue ball below center, it can slow quite a bit as it goes across the cloth and picks up forward spin.
 
giulichajari said:
A friend told me..if you shot quickly (moving the cue quickly), the white ball speed will be more, on the other hand, slowly will be less?

Is certain? or which is the fact which determines the speed of the cue ball?
Click to expand...
Not sure what you mean, but in terms of physics, the speed of the CB after contact with the OB is mainly based on how full a hit you have on the OB. The thinner the hit on the OB, the less speed will be taken off the CB, the fuller the hit on the OB, the more speed is taken off the CB.
 
.ca. somebody explain why it is even a matter of thought "does hitting something harder increase the spped when compared to hitting it softer"?

Huh
 
mikepage said:
Whether the cuestick is accelerating at impact doesn't matter. What matters is its speed and its mass.

Typically a stick is around 18oz and a ball is around 6oz. The speed of both the stick and the ball after the collision is determined by conservation of kinetic energy, which is approximate but pretty good, and conservation of momentum, which is exact.

What you will find is that the stick slows down to about half its original speed and the ball takes off at about one and a half times the original speed of the stick
Click to expand...

Told you someone would have the correct answer.

Thanks Mike
randyg
 
giulichajari said:
Obviously the angle between the cue ball and the object ball is important..

Close to center is slower than up or down?
Click to expand...

The further away from center the slower the directional speed.
A dead center hit would produce the best transfer of directional energy.

randyg
 
A rather unusual question from the OP, but I'm happy it generated some thoughtful, interesting discussion. This kind of stuff is why I look at this forum, and I hope there's more of it.
 
giulichajari said:
A friend told me..if you shot quickly (moving the cue quickly), the white ball speed will be more, on the other hand, slowly will be less?

Is certain? or which is the fact which determines the speed of the cue ball?
Click to expand...

Not sure why this would be confusing, if you hit the cueball harder (more speed in the cue) it will have more force behind it and will go faster. Same as anything. Throw a ball with greater force and then slower and see how far they go.

Physics, Mass + Speed (acceleration) = Force.
 
If you take a running start and use an extension you can get that thing over 700 MPH.
650 MPH if you decelerate.
 
SmoothStroke said:
If you take a running start and use an extension you can get that thing over 700 MPH.
650 MPH if you decelerate.
Click to expand...
That’s the “Ram Shot”.
Invented by one of the most influential billiards writers...Poolkillers.

Ram Shot Videos
http://www.youtube.com/watch?v=8kkjopqJhZE
http://www.youtube.com/watch?v=DJe9AhiySnE
https://m.youtube.com/watch?v=W5nu11AMZXY

PoolKillers
https://issuu.com/poolkillers81/docs...to_8_ball_pool
http://forums.azbilliards.com/showthread.php?t=454714
 
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