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stephie123
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Every pool shot, that does not have a spin or anything crazy done to it, always hits and moves away at a 90 degree angle. How can I prove this mathematically?
stephie123 said:Every pool shot, that does not have a spin or anything crazy done to it, always hits and moves away at a 90 degree angle. How can I prove this mathematically?
D H said:These three articles do a nice job explaining the 90o rule:
http://billiards.colostate.edu/bd_articles/2004/jan04.pdf
http://billiards.colostate.edu/bd_articles/2004/feb04.pdf
http://billiards.colostate.edu/bd_articles/2004/march04.pdf
NB: The ninety degree rule only applies if the cue ball is slipping along the felt with no topspin or backspin.
The 90 degree rule in Billiards is a fundamental principle that governs the direction of a ball after it is hit by the cue stick. It states that the angle of incidence (the angle between the incoming ball and the cushion) is equal to the angle of reflection (the angle between the outgoing ball and the cushion), when the ball hits the cushion at a 90 degree angle.
The 90 degree rule is important in Billiards because it allows players to predict and control the path of the ball after it bounces off the cushion. This knowledge is crucial in executing shots and positioning the cue ball for the next shot.
The 90 degree rule greatly affects the game of Billiards as it determines the trajectory of the balls on the table. It allows players to plan and strategize their shots, leading to a more skilled and competitive game.
Yes, there are a few exceptions to the 90 degree rule in Billiards. It may not apply when the ball is hit at a very low speed or when it hits the cushion at a very shallow angle. In these cases, the ball may not follow the expected path and may deviate from the 90 degree rule.
Players can use the 90 degree rule to their advantage by understanding and mastering the concept. By knowing the exact angle at which the ball will bounce off the cushion, players can plan and execute shots with precision and accuracy, giving them a competitive edge in the game.