When looking for the right ball for your child, you may come across a reference to different sizes of soccer balls. These sizes can vary a bit from product to product but most do conform to certain league standards. A size 1 ball is also known as a mini ball and is typically between 18 and 20 inches in circumference. This size is perfect for toddlers and early walkers to help them develop footwork skills and ball control. A size 3 ball, or a junior ball, is usually between 23 and 24 inches around. This is the type of ball that most peewee soccer teams use as it is designed for children 8 years and younger. As your child grows and continues with their soccer team, they will eventually need a size 4 ball which is 25 to 26 inches. This is known as a youth ball and is ideal for children between 8 and 12 years of age. Finally, the size 5 or adult ball is 27 to 28 inches in circumference. This is the size of the soccer ball used by professional athletes and is suitable for anyone age 13 years or older.
When any object goes through the air, a thin cushion of air wraps around it that stays relatively still. This boundary layer is why you get dust trapped on your ceiling fan. At slower speeds, the air around a soccer ball moves smoothly over the surface and separates off the sides of the ball at its widest points. Imagine a ball moving from right to left across a clock, Goff explains, so traveling from the 3 to the 9. With laminar flow, the air flows over the surface and then flows off at the 12 and 6, which creates more drag in the air. Drag slows the ball down faster. At higher speeds, the air moves turbulently across the ball’s surface and peels off at the 2 and 4. The wind effectively wraps around the back. This turbulent flow has less drag, which means the ball keeps moving at high speed for longer.
Soccer — or football as it's known around the world — is arguably the most loved sport on Earth. Although Americans still aren't as enamored of the sport as the rest of the world is, teams around the country are stealing hearts and minds, and Americans are getting into the game. For years, soccer has been a sport played by kids, college students, and ex-pats, but it's now being cheered in stadiums and watched on national TV. https://www.youtube.com/watch?v=DGp37du0xbQ