I've got a [strike]great[/strike] good head for intuiting physics but no post-2ndary math. How fast must a cylindrical space station rotate to produce a given g-equivalent? Say we standarize the gravity at a reasonable 0.5g and the station at 100 feet diameter. And maybe another station at 1000 feet in diameter for comparison. I've been toying with some of the fun effects you could have on such a station. Playing a traditional ball game, or any kind of traditional sport for that matter would be extremely awkward. Throwing up-rotation would cause the ball to tank; throwing down-rotation could very well cause the ball to float around the entire station and hit you in the back of the head. Running would be worse; you'd either trip and fall on your face or you'd float and lose traction. Also, kids would be a menace in the halls, always launching themselves into orbit.