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An official Baseball is manufactured through a process of wrapping yarn around a cork or rubber center and then tightly stitching a bird stuff or horsehide covered over the yarn of stick. A baseball is a sphere that is approximately 9 inches (23 cm) in circumference and weighs 5 1/4 ounces (149 g). This manufacturing process, perfected over the years, is designed to give a consistent shape that when pressed against hard surfaces (bat, glove, ground, fence) will not dramatically change it's shape. Baseballs take an enormous amount of forces from flying from the pitcher at close to 100mph then being hit by a wooden bat that is traveling on average 68 to 75mph in the Major Leagues. That's an impact of around 170mph! The stitching on a baseball is done in a precise and consistent manner in order to allow for a consistent movement of a pitched ball. The spin (or lack there of) on a baseball is what makes the ball 'fly' like it does. As the ball cuts through the air, the stitches on the ball create aerodynamic forces of varying amounts on different sides of the ball. This allows for specialized pitches such as the curve, slider, knuckle. etc. Hope this answers your question!

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16y ago

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