What does pool mean? What does it mean to bump

Billiards. Also known as billiards, it is a game played on a rectangular table, using a specified number of small balls and a long club, it is a popular sport, the age of the sport is from 5 to 95 years old, it can be said that it is suitable for all ages. There are several main types of pool balls:

Carom (or pool ball) is played on a bagless table with 3 balls. The other main pool games are played on a table with 6 holes, 4 of which are located in the corner of the table (bottom pocket) and 2 on the long side of the table (waist pocket). These games include pool with 3 balls; snooker, with 21 balls and 1 cue ball; and pocket billiards (or pools) with 15 balls and 1 cue ball.

There are many different ways to play each game, especially Garonm pool and pocket pool.

It's a sweat-free sport and you don't need to change out of your special sweatshirts or shoes. After work, you can take time to play a game of pool in formal attire, and attend a cocktail party or dinner party in time without changing your face. Pool is a highly intelligent sport that is designed and accomplished like a diplomatic mission, challenging and brainstorming.

Billiard, like diplomacy, has to go through the stages of layout, conception and execution. The process can be offensive or defensive, advanced or retreated, or direct or indirect. If you can't pool the ball directly, you can use methods such as pouring the ball, borrowing the ball, and cushioning to get the hole.

If you can't attack for a while, you can temporarily use it as a safety ball or a lob. It is popular with the general public because it does not require a large space and can be easily entertained.

Collision is the act of collision or collision between two objects. Usually, the word collision is used to describe collisions between physical objects, such as two cars colliding, two soccer players colliding during a game, etc. The word can also be used as a metaphor for non-physical behavior, for example, when two people are fighting each other, we can also describe them as talking to each other.

In physics, collision is a very important concept that plays a crucial role in describing the interaction between objects. In physics, the types of collisions can be divided into fully elastic collisions and completely inelastic collisions. In a fully elastic collision, the objects bounce back after colliding, and energy and momentum are conserved.

In a completely inelastic collision, energy conversion and loss occur.

In addition to collision in physics, the word is often used in everyday life. For example, two people collide while walking on the street, or accidentally collide while exercising. At the same time, the word can also be used as a metaphor for non-physical things, such as saying that two people collide in a meeting.

The word crash is also often used in vehicular accidents. Vehicle collisions can result in injury or even death, so be careful when driving. In the event of an emergency, stay calm and avoid vehicle collisions to ensure your own safety and the safety of others.

If a vehicle collision occurs accidentally, it is necessary to call the emergency Bi Wang** in time, contact the hospital and the traffic police, and carry out timely rescue and treatment.

In conclusion, bump is a word that describes the interaction between physical objects and can also be used metaphorically to describe actions and things in everyday life. In the event of a vehicle accident, it is important to stay safe to avoid vehicle collisions and ensure the safety of yourself and others. <>

v1'=(2m2v2-m2v1v2+m1v1)/(m1+m2)，v2'=(2m1v1-m1v2+m2v2)/(m1+m2）。

Analysis of filial piety:

Let m1 and m2 represent the masses of the two spheres, respectively;

v1 and v2 represent the velocity of the two balls before collision, respectively;

v1 and v2 indicate the velocity of the two balls after they collide;

According to the law of conservation of momentum: m1v1 m2v2 m1v1 guess potato m2v2 ;

According to the conservation of energy: 1 2m1v1 2 1 2mv2 2 1 2mv1 2 1 2mv2 2.

Notes:

Under ideal conditions, the physical process of a fully elastic collision satisfies the conservation of momentum and energy. If the masses of the two colliders are equal, then the equations for the conservation of momentum and energy can be solved at the same time: the two colliders exchange velocity.

If the ball is at rest, then the velocity of the ball is the same as that of the colliding ball, and the colliding ball stops. A similar analysis can be performed when multiple balls collide. In fact, because the collision between the balls is not an ideal elastic collision, there will be a loss of energy, so eventually the ball has to stop.

A foul action in basketball is the physical contact of the ball carrier pushing or moving to the torso of the defender, and when the defender has already stood in advance at the moment of contact, the offensive player constitutes a dribbling collision.

The defender is in position and you knock him down with the ball.

Hitting with the ball is a foul action in basketball, which is the physical contact of the ball carrier pushing or moving to the torso of the defender.

The distinction between hitting with the ball and blocking should be based on the following eight principles:

1.Defending players do not take into account the factors of time and distance.

2.Defenders must face attacking players with the ball.

3.Defence can be shifted sideways or retreated, allowing one or both feet to leave the ground instantaneously.

4.Defenders must establish a legal defensive position.

5.The defender must be in position first and the contact must be on the torso.

6.A member of the team has the right to land in the same place where he jumped.

7.The player has the right to land in other places that the opponent did not occupy before he jumped.

8.The team members have rights to the space from the ground to the overhead.

It means accusing the ball personnel of physical collision with the defender in the process of attacking, if the defender's feet or body move while defending, it is a blocking foul, if the defender does not show his feet or body movement during the collision, this is the attacker's collision with the ball!