A stimpmeter measures the speed of a ball over what surface?
Explanation
The answer is Golf Putting Green because a stimpmeter is specifically designed to measure the speed of a golf ball on a putting green. A stimpmeter is a device used in golf to determine the "stimp" or speed of the green. It consists of a ramp that is set up on the green, and the angle at which a golf ball rolls down the ramp indicates its speed. By measuring the distance the ball travels, golfers can determine the speed of the putting green and adjust their strokes accordingly.