Bowling form one and three pins. There are countless ways a bowler can achieve a strike. However, the goal for a bowler on every first ball is to achieve a strike using the method that generates the highest strike percentage. A "perfect strike" is a strike where the ball hits only four pins: the one, three, five and nine pins. The ball enters the one-three pocket, and then falls into the pit area to the right of where the eight pin previously stood. A stroker is a type of player in ten-pin bowling who releases his or her bowling ball in a
Bowling ball lighter, and without holes, so that they may be held in the palm of the bowler's hand. Most bowling alleys provide balls for patrons to use within the establishment, often referred to as "house balls." Key properties of ten-pin bowling balls include surface friction, porosity, and mass distribution, which affect the motion of the ball as it rolls. These properties are varied to control how much a ball will slide through the oily surface of a typical bowling lane, and how easily a ball will change direction when the roll is combined with rotational motion. Friction and porosity are variables