What is the 90 degree rule in billiards?

What is the 90° rule? The 90° rule states that for a stun shot, where the CB has no top or bottom spin at impact with the OB, the CB and OB separate at 90°, regardless of the cut angle (except for a straight-in shot, in which case the CB stops in place).

What is Dr Dave billiards 30 degree rule?

The 30° rule states that for a rolling-CB shot, over a wide range of cut angles, between a 1/4-ball hit (49 degree cut) and 3/4-ball hit (14 degree cut), the CB will deflect or carom off by very close to 30° (the “natural angle“) from its original direction after hitting the OB.

How do angles work in billiards?

A simple way to visualize and estimate cut angles is to imagine an analog clock face (or use one on your wrist). If noon (12) is straight (0°), 11 and 1 are at 30° (1/2-ball hit), 10 and 2 are at 60° (about an 1/8-ball hit), and each minute is 6°.

What is the angle between billiard balls?

The angle between the two paths, after the collision, is always close to 90 degrees. The path taken by the ball that was initially at rest is along the line joining the ball centres when they first touch. The latter result arises because the friction force between two billiard balls is very small.

What is the 3 wall rule in billiards?

The most popular rule is that you can pocket balls without touching the rail if you hit at least three rails before you hit the object ball. In this way, you can also do something with balls that are close to a pocket and cannot be played as a bank shot.

NV 3.4 - 90° rule with various cut angles

What is the two shot rule in pool?

In the event of a foul, the opposing player receives two shots and these shots carry (i.e. if a ball is potted on the first shot, the player still has two shots). When a player gets two shots, they can pick up the white ball and place it anywhere behind the line.

What is the golden ratio in billiards?

Mathematician Rick Mabry used trigonometry to find the most difficult straight shot, which is when the distance from the pocket to the cue ball is 1.618 times the distance from the pocket to the object ball. You may recognize this famous number as Phi, or the golden ratio.

What angle makes a ball go farthest?

A projectile, in other words, travels the farthest when it is launched at an angle of 45 degrees.

What are the 5 angle rules?

What are the angle angle rules?

In two triangles, if two pairs of corresponding angles are congruent, then the triangles are similar . (Note that if two pairs of corresponding angles are congruent, then it can be shown that all three pairs of corresponding angles are congruent, by the Angle Sum Theorem.)

What is the black rule in pool?

As per the black ball rules, the players can only pot the 8-ball at the end of the game after all the designated balls have been potted. No player can hit the black 8-ball directly with the cue stick. When a player plays the break shot, they can pot any object ball apart from the 8-ball.

What is the bumper rule in pool?

What Are the Bumper Pool Rules? The rules for bumper pool are simple—be the first player to sink all five of your balls into your hole at the opposite end of the bumper pool table.

What is the kitchen rule pool?

a scratch on any shot results in ball-in-hand in the “kitchen” (behind the head string), and you must shoot the CB out of the kitchen before contact with a ball or cushion. if you pocket one or more balls on the break, the group with the largest number of balls down becomes your group (i.e., the table is not open).

Why does 90 degrees give the maximum height?

The maximum height is determined by the initial vertical velocity. Since steeper launch angles have a larger vertical velocity component, increasing the launch angle increases the maximum height.

Why is 45 degrees not the best launch angle?

A launch at 45 degrees would allow the ball to remain in the air for a longer time, but it would then be launched at a lower horizontal speed at the start and it would slow down more because of the longer flight time. An additional aerodynamic force arises if the ball is spinning.

What is the best angle to release a ball?

If there were no air resistance, you would get the maximum distance by throwing at a 45° angle (Figure 3). But there is air resistance, and the faster the ball is thrown, the more air resistance there is. Also, the longer the ball is in the air, the more time there is for air resistance to slow down the ball.

What is the 3 foul rule in 8-ball?

The opponent legally pockets the 8-ball. IMPORTANT: This rule is not utilized in amateur league play. If a shooter commits a foul three times in a row without making an intervening legal shot, the result is a loss of game. The three consecutive fouls must occur in the same game.

Is a push shot legal in pool?

It is a foul if the cue ball is pushed by the cue tip, with contact being maintained for more than the momentary time commensurate with a stroked shot. (Such shots are usually referred to as push shots.)

What is the golden break rule in 8-ball pool?

Golden Break – Similar to American 9-ball Pool, a player can win the frame off the break. They must pot the 8-ball from the break and win it outright. This rule was formerly used in the Taom Shootouts. Golden Duck – Undesirably, if the breaking player pockets the 8-ball and cueball they lose the frame outright.

What is the hardest billiards game?

Snooker is “harder” because of the very large table size and the “rounded” pockets vs. the “boxy” (kind of V shaped) pockets on pool tables.

What is fast 8 in billiards?

Fast Rack 8: Good for all skill level players, this version has the rack set up like a 9 ball game but with 4 striped balls, 4 solid balls and the 8 ball in the middle. Played like standard 8 ball but with 3 less balls for each player to shoot it makes for a much quicker game.

Can you put the cue ball anywhere after a scratch?

A scratch, foul, or illegal shot results in ball-in-hand, where your opponent can place the cue ball anywhere on the table in preparation for the next shot. The only exception to this is the break (see the 8-ball and 9-ball differences that follow).