According to a certain golf association, the weight of the golf ball ball shall not be greater than 1.620 ounces (45.93 grams). the diameter of the ball shall not be less than 1.680 inches. the velocity of the ball shall not be greater than 250 feet per second. the golf association periodically checks the specifications of golf balls using random sampling. twotwo dozen of each kind are sampled, and if more than three do not meet size or velocity requirements, that kind of ball is removed from the golf association's approved list.