# Frequent question: Why did billiard ball not move?

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When all of the objects are sitting still, they have potential energy. Without a collision (an external force) the objects will not move. … The harder this group of billiard balls is hit the more energy is transferred to them and the more they will speed up and move.

## What happens to two billiard balls that collide?

When two billiard balls collide the collision is nearly elastic. An elastic collision is one in which the kinetic energy of the system is conserved before and after impact. … For collisions between balls, momentum is always conserved (just like in any other collision).

## Why does a billiard ball at rest move when hit by a moving billiard ball?

Before the collision, the stick is moving towards the ball at a high speed. After the collision, the stick stops moving. It transfers some of its kinetic energy to the cue ball, which rolls forward. But some of the kinetic energy is also lost to friction between the ball and the table, causing it to roll.

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## Why did billiard balls explode?

It was a side effect of no longer making them from ivory

There was a time when taking a perfect shot in a game of billiards could cause the ball to explode. That’s because the balls were made of celluloid, an early plastic that was, unfortunately, combustible.

## What is the motion of billiard ball?

The ball, as we mentioned above, will have a spin and a sliding motion at the very start. the velocity of P. = rotation velocity at P. i.e. the moment when the sliding ceases and the ball has a pure rolling motion where v = Rω..

## What happens when two moving objects collide?

Newton’s Third Law of Motion and Collisions

When two objects collide, each object pushes the other. Think about hitting a softball with a bat. The bat collides with the ball and pushes it away. The ball also exerts a force on the bat.

## Do all billiard balls have the same mass?

Pool balls are generally the same size and weight, with the exception of the cue ball (the white ball). The cue ball and other balls can be a different size and weights depending on a few factors.

## Does a cue ball weigh more?

Does a Cue Ball Weigh More? The cue ball in most sets will be the exact size and weight as the object balls. However, older coin-op pool tables may have one that is slightly bigger and heavier due to the mechanics of separating object balls from the cue ball under the table.

## How low can you hit a cue ball?

As illustrated in Diagram 1a, the miscue limit is generally accepted to be half the ball’s radius (0.5R) from center. It just so happens that many pool balls have a stripe width that is very close to half the ball’s diameter.

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## What will happen to the momentum of a ball when it hits another ball?

When the balls collide, they share energy, momentum and angular momentum. … In elastic collisions all energy spent on the deformations are stored as elastic potential energy – this is returned as kinetic energy for the motion as soon as the flexible bonds have bounced back.

## Do pool balls get old?

The average billiard balls wear out after about a year of use to a size that is no longer considered to meet specifications. The cue ball will degrade faster due to constantly being struck by cue tips. However, if your pool table isn’t subjected to much use, then your balls can last well over a year.

## Why do pool balls turn yellow?

Pool balls turn yellow due to exposure to UV light, heat, and air. These elements combine to break down the materials used to construct pool balls, giving them an off-white appearance.

## Are billiard balls hollow?

We also know these as billiard balls. They are solid and not hollow.. … Although they were originally made out of ivory, today the pool balls are made out of resin and other materials. Pool balls are essential to playing pool, and with them being solid instead of hollow, it completes the game and makes it fun to play.

## What does billiards mean?

: any of several games played on an oblong table by driving small balls against one another or into pockets with a cue specifically : a game in which one scores by causing a cue ball to hit in succession two object balls — compare pool entry 3.

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## What is the white ball called in pool?

CUE BALL. (General) The white, unnumbered ball that is always struck by the cue during play.

## How does a billiard ball work?

Magnetic cue balls that go into a pocket are separated from numbered balls by a magnetic detector. As the magnetic ball passes this detector, the magnet triggers a deflecting device that separates the cue ball and, again, sends it into the opening on the side of the table.