Velocity of Cue Ball: Instant vs. Impact on Pool Table Debate

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In summary, the conversation is discussing the best placement of the cue ball for a break shot on a pool table. One argument is that the cue ball is never faster than the instant it comes off the cue stick, while the other argues that it accelerates until it hits the other balls. However, once the cue is no longer in contact with the ball, it can no longer accelerate it. The placement of the cue ball should be based on finding a balance between power and control. The farther into the table the cue ball is placed, the less power can be delivered, while the closer to the edge allows for more control.
  • #1
syano
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On The Pool Table ...

At the break where is the greatest velocity of the cue ball? At the instant it comes off the stick or the moment it hits the balls?

The question here is is it better to shoot the cue ball at the line or to pull the cue ball back and increase the distance to the balls?

One argument is that the ball is never faster than the instant it comes off the cue. The other argument is that the ball is accelerating once it comes off the cue stick and that the velocity increases until it hits the balls.

Which argument is correct?
 
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  • #2
Once the cue is no longer in contact with the ball, it longer imparts a force on it. Without a force, the ball cannot accelerate. The ball just decelerates due to the friction of the felt.

The logic in choosing where you want to place the cue for a break has nothing to do with this question, though. You want to place it where you can hold the cue in such a way to deliver the most power with the most control -- it's a trade-off. Generally, the further into the table, the less power you'll be able to deliver, and the closer to the edge, the less control you'll have.

- Warren
 
  • #3
We can hit the ball with the same amount of the control whether it is at the line or against the rail.

Thanks for the reply chroot... You mentioned, "the further into the table, the less power you'll be able to deliver." I don't understand. It seems to me the closer you are, to the balls you are about to hit with the cue ball, the more power you will be able to deliver. And the further away you are the less power you will deliver.

Where am I off?
 
  • #4
Depends on your strike --- topspin might give a little "acceleration" (conversion of spin energy to translation along the table), but the energy of the strike (translational plus whatever spin) is from the cue stroke.
 
  • #5
syano said:
.

Thanks for the reply chroot... You mentioned, "the further into the table, the less power you'll be able to deliver." I don't understand. It seems to me the closer you are, to the balls you are about to hit with the cue ball, the more power you will be able to deliver. And the further away you are the less power you will deliver.

Where am I off?

The difference is largely in your stance. The farther the ball is from the edge, the more you must stretch out of position to make your stroke. It is much the same as with determining where to place your guide hand (the one the cue stick slides through); closer to the ball gives you beter controll, further away allows more power.
 

1. What is the difference between the instant velocity and impact velocity of a cue ball on a pool table?

The instant velocity of a cue ball refers to its speed at a specific moment in time, while the impact velocity is the speed at which the cue ball collides with another ball or the cushion of the pool table.

2. Which velocity is more important in determining the outcome of a shot?

Both the instant velocity and impact velocity can play a role in the outcome of a shot. The initial speed of the cue ball can affect the angle and direction it travels, while the impact velocity can influence the amount of spin and resulting path of the cue ball.

3. Does the type of cue ball used affect its velocity on the pool table?

Yes, the material and weight of the cue ball can affect its velocity on the pool table. For example, a heavier cue ball may have a higher impact velocity, while a smoother cue ball may have a higher instant velocity.

4. How does friction on the pool table affect the velocity of the cue ball?

Friction between the cue ball and the pool table can slow down the instant velocity of the cue ball, especially if the cloth is worn or dirty. However, it can also increase the spin and impact velocity of the cue ball, which can affect the trajectory of the shot.

5. Can a player control the velocity of the cue ball on a pool table?

Yes, skilled players can control the velocity of the cue ball through their technique and use of spin. By striking the cue ball at different angles and with varying amounts of force, players can achieve different instant and impact velocities to execute specific shots on the pool table.

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