As of January 1, 1942, an upper limit (250 feet/second) was set on the velocity a golf ball could travel when hit with a new USGA testing machine.
ITF
The International Tennis Federation is located in England and is the international governing body for tennis. It writes the rules and regulates tennis technology internationally.
Mass
The mass of an object is essentially its weight.
Maximum Dimensions
ITF set dimensions for a tennis racket with an upper limits of 32 inches in overall length with a strung surface no larger than 11.5 inches in width and 15.5 inches in length.
Polara
A golf ball designed in the 1970s by two non-golfing scientists where the dimples on the poles are shallower than those on the circumference thereby reducing hooks and slices.
R&A
The Royal and Ancient is the governing body for golf in Britan. It writes the rules that governs play in England and runs the British Open.
Spherically symmetrical
In 1977, after the USGA realized that a performance standard would not suffice, it wrote a draft of a symmetry standard. By 1981, the official standard was published and enforced. “The ball must not be designed, manufactured or intentionally modified to have flight properties which differ from those of a spherically symmetrical ball.”
Sweet Spot
The sweet spot is the part of the implement that yields the highest rebound velocity. It is in this spot where the athlete gets the maximum return for his or her effort.
USGA
United States Golf Association is the governing body in the United States for non-professional golf. It writes the official rules of golf and approves equipment for use. It does not govern the professional tour which is governed by the PGA Tour.
Velocity
Velocity is the speed of an object and is correlated with the distance a hit object travels. The faster the impact velocity (speed of the implement to hit the object), the faster the rebound velocity (speed of the object leaving the implement), and the faster the rebound velocity, the farther an object will travel.
