How many times does a wheel rotate in a second going 5MPH?

To determine how many times a wheel rotates in a second at 5 mph, we first convert the speed to inches per second: 5 miles per hour is approximately 88 inches per second. If we assume a standard wheel diameter (for example, 26 inches), its circumference would be about 81.68 inches. Dividing the speed (88 inches/second) by the circumference (81.68 inches) yields approximately 1.08 rotations per second.