Basketball Dynamics - Air Pressure and Weight

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The Dynamics of Basketball Bouncing –
How Air Pressure and Temperature Effect Basketball Rebound
Introduction: Hi. My name is Greyston Aguilera and I will be testing the dynamics of basketball bouncing and how air pressure and outside temperature will affect how a ball bounces. Almost all sports involve using balls. In a lot of sports the weight and air pressure is regulated. For example, the National Basketball Association regulations say the ball air pressure must be between 7.5 pound per-square-inch (psi) and 8.5 psi. That means that if you have less than 7.5 pounds of air pressure in the ball, it won’t be as bouncy, but if you have more than 8.5 psi, the ball will be too bouncy and hard to control. The reason there is a standard is so the players have a better performance and it’s fairer. The bounce can also be effected by how cold or hot it is. In the following paragraphs, I will be demonstrating the history and other research about this project. History of Basketball: A basketball is a round inflated ball used in the game of basketball. The first ever known basketball game was invented by physical education teacher James Naismith in 1891. They first played with a tiny soccer ball and a peach basket. The final score of the first basketball game was 0-1. Dribbling was not part of the original game because the laces on the ball would mess up how the ball bounced. The official ball used in the National Basketball Association (NBA) is made by Spalding, and each one has to be officially approved by the NBA. The official ball for men is 29.5 inches in circumference, inflated to be between 7.5 and 8.5 psi, and weighs 22 oz. This is usually called a "Size 7" ball. If women are playing, the official basketball size is 28.5 inches in circumference (size 6) with a weight of 20 oz. NBA basketballs are constructed of orange leather with black lettering. A basketball is designed to bounce continuously and consistently throughout several games and...
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