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Sizes, Weights, & Things

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Big	Bigger	Biggest
Heavy	Heavier	Heaviest
Bowling Balls are the best example in correlating weight and size. Bowling balls are designed and produced for various age groups as well as weight throwing ability. Hence small kids use big bowling balls with the least weight. Grown-ups depending upon their hand grasp and weight throwing ability may choose from the bigger and heavier ball to the biggest and heaviest ball. To learn how to play bowling, please go to http://www.howtoplaybowling.com/more-on-how-to-play-bowling

Golf Ball	Golf Balls are a feat of modern day engineering. It consists of an inner core of rubber, a softer outer core, a much harder, ionomer mantle and a soft polyurethane cover. On the tee a ball is compressed by approximately a quarter of its diameter. The rubber that forms the core deforms under the force of the club and absorbs a great deal of the energy from the player's swing. he harder the ball, the further it goes. Although it is designed to absorb certain deformity, if it is too soft and collapses or deforms into a spherical shape when hit by the club, it looses drive or transport power. However, the softer the ball the better control for the golfer. The trade-off for drive distance is ball control, and if you really want to compete you need your ball to deform as it is hit.
Tennis Ball	The Intl Tennis Federation provides that the official diameter as "more than" 2 and 1/2 inches but "less than" 2 and 5/8 inches. The weight is "more than" 2 ounces but "less than" 2 and 1/16th ounces. The rules also say that, when dropped onto a concrete base from 100 inches, the ball should bounce "more than" 53 inches but "less than" 58 inches. In order to achieve this, most balls are pressurized and filled with air. Finally, the rules state that the "stiffness" of the balls, defined by how much they deform (curve in or out) at 18 lbs of pressure, must be "more than" .220 inches and "less than" .290 inches for forward deformation. For return deformation it must be "more than" .315 inches and "less than" .425 inches. Reference: CNN
Soccer Ball	The "bend" is soccer jargon for the curve of the ball as it travels through the air on a free kick. Like the curve ball thrown by a baseball pitcher, or a volleyball when served, the spinning soccer ball when kicked tends to deflect the air moving past it, and the air responds by deflecting the ball on its path. This physical principle is referred to as the Magnus force. When the ball is spinning after being kicked, the air through which the ball travels tends to follow a longer path around one side of the ball than the other, as the air is dragged along by the turning surface of the ball. The air following this longer path will bend more sharply, which results in a significant drop in air pressure on that side of the ball. The ball will then be pushed toward its low-pressure side, causing deflection. A further physical consideration in understanding the bend of the soccer ball in flight is the wake deflection force. As a moving ball will leave a turbulent wake of air behind it, the spin of the ball will deflect the wake to one side. This deflection will shift the air stream flowing around the ball; the air stream will in turn push back on the ball. The Magnus and wake deflection forces operate in the same direction, contributing to the remarkable curvature on free kicks from players such as Beckham. Source: www,aqs.org