# When 2 pool balls collide and experience the same force Why do they go in opposite directions?

Since the two balls have equal masses, they will also experience equal accelerations. In a collision, there is a force on both objects that causes an acceleration of both objects; the forces are equal in magnitude and opposite in direction.

## What happens when two pool balls collide?

It will have transferred all of its kinetic energy to the other ball, which will move forward with the same velocity that the cue ball had before the collision. Collisions can only be elastic if the masses are equal. The masses of billiard balls are the same, which can make some collisions close to elastic.

## What will happen to the momentum of billiard balls when they collide with another ball?

Pool is a great example of physics in action. After every collision, the momentum of all the balls—the product of their mass and velocity—has to be conserved. That is, the total momentum before the collision has to be the same as the total momentum after the collision.

## How do you calculate ball collisions?

Since the large ball falls a distance h to the floor, its kinetic energy is (1/2)MVi2 = Mgh, so its speed is Vi = Sqrt2gh. Since it bounces elastically from the floor, this will be its upward speed. The small ball also falls a distance h, so its speed just before the collision is also vi = Sqrt2gh.

## Is billiards geometry or physics?

Pool, or pocket billiards, is a game of mathematics and physics. The basic goal of play is to deposit balls into the pockets by hitting them with the cue ball. How the player strikes the cue ball (how hard, where, and in which direction) determines how the cue ball will interact with the other balls.

## What type of collision is demonstrated in billiard balls?

An elastic collision is one in which the kinetic energy of the system is conserved before and after impact. Therefore, for simplicity one can assume that for collisions involving billiard balls, the collision is perfectly elastic.

## Why does a ball stop when it hits another ball?

Friction – as the ball rolls, the ball loses its energy to heat and sound. As the energy is lost, the ball slows down and eventually stops. Answer 6: Friction – the force that is preventing the ball from moving on and on and on.

## What type of collision is two billiards collide and then separate?

Elastic collisions involve objects which separate after they collide, and which are not changed at all by the interaction. Billiard balls, ping-pong balls, and other hard objects may collide elastically. Kinetic energy is conserved in elastic collisions.

## What type of collision is two balls colliding?

Elastic collisions occur when the colliding objects bounce off of each other. This typically occurs when you have colliding objects which are very hard or bouncy.

## How do you calculate speed after a collision?

Final Velocity Formula In a perfectly inelastic collision, the two objects stick together and move as one unit after the collision. Therefore, the final velocities of the two objects are the same, [Math Processing Error] v 1 ′ = v 2 ′ = v ′ . Thus, [Math Processing Error] m 1 v 1 + m 2 v 2 = ( m 1 + m 2 ) v ′ .

## What are 3 types of collisions?

• Perfectly elastic collision.
• Inelastic collision.
• Perfectly inelastic collision.

## How do you calculate before and after collision?

1. Work out the total momentum before the event (before the collision): p = m × v.
2. Work out the total momentum after the event (after the collision):
3. Work out the total mass after the event (after the collision):
4. Work out the new velocity:

## How do you find the momentum of two objects before a collision?

An object’s momentum before collision is given by P = mv. In the absence of external force, its motion and momentum do not vary before the collision.

## What type of math is used in pool?

The most popular game on the pool table is “8 ball” but there are other games, too. No matter which game you play, understanding the underlying rules of geometry, trigonometry, and physics, will help you sink a ball into a pocket.

## What type of math is used in billiards?

In recreational mathematics, arithmetic billiards provide a geometrical method to determine the least common multiple and the greatest common divisor of two natural numbers by making use of reflections inside a rectangle whose sides are the two given numbers.

## What type of collision is pool?

An elastic collision is when the kinetic energy from the system is conserved before and after the impact, and an inelastic collision is when kinetic energy is list. Pool balls hitting each other are considered elastic collision because of the conservation of kinetic energy and momentum.

## Is a bouncing ball an elastic collision?

When a ball is dropped to the ground, one of four things may happen: It may rebound with exactly the same speed as the speed at which it hit the ground. This is an elastic collision.

## What is the final momentum of the cue ball after the collision?

After you hit the cue ball, its momentum is mass times velocity. The momentum of the 8 ball is zero because it is not moving yet. If you hit it straight on and the cue ball stops at the collision, then all of momentum of the cue ball must go into the 8 ball because momentum is conserved.

## Which form of energy causes a ball to hit the other balls on a pool table?

The collision of another ball into the group of billiard balls in the picture below will carry its kinetic energy into the group and transfer that energy to all of the ones sitting still. The balls that are sitting still exchange some of their potential energy to the ball that hit them.

## What will happen to the velocity and momentum of each ball when the small ball hits the heavier ball?

What will happen to the velocity and momentum of each ball when the small ball hits the heavier large ball? The momentum and velocity of the small ball will transfer to the big ball but will not move it far. State Newton’s third law of motion.

## What caused the stopping of the ball?

Rolling friction is the resistive force offered by any surface which opposes the rolling motion of any object that rolls over it, thus causing it to slow down and eventually stop. B The force of friction acts against the motion of the ball. A rolling ball stops because the surface on which it rolls resists its motion.