A tennis ball is pressurized, so it loses its bounce when the gas inside is repeatedly forced to make the ball regain its shape. Discover how the gas molecules are able to escape a tennis ball over time with help from a USPTA certified tennis pro in this free video on tennis equipment. Expert: Lincoln Ward Bio: Lincoln Ward is a USPTA Certified Tennis Pro. He has 13 years of competitive playing experience, as well as 10 years of coaching experience. Filmmaker: Todd Green
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