[hw97karbine] has made a pretty cool tennis ball cannon. While making a cannon of this sort is nothing new to us, we were impressed by the effort taken to get a stoichiometrically ideal mixture of ...

In many ball sports like golf, football and tennis, controlling the ball’s spin is an important skill. Expert players can make golf balls curve around obstacles, launch footballs towards goal ...

"These contributions vary from person to person," Elliott says, "but the data shows the clear ... ball (a phenomenon known as the Magnus effect) to make it nose-dive into the service court. A ...