When the ball rolls, the side spin takes over and the ball can hook back toward the middle of the lane in a straight line. The combination of sliding in a parabolic path and then rolling in a straught line looks like a big hook when some bowlers throw the ball.
3. the interaction of the ball with the pins - The pins are arranged across the 3.5 feet of the alley and 3 feet deep
( 7) ( 8) ( 9) (10) ( 4) ( 5) ( 6) ( 2) ( 3) ( 1)
The collision of the ball with the pins is a chaotic system. Small variations in the velocity (speed and direction) of the ball when it hits the pin, as well as collision location can lead to widely different results. For example, a very straight throw that hits the head pin head on, can lead to a 7-10 split which is nearly impossible to make. In fact, making the 7-10 is a shot that requires a huge amount of good luck. The "pocket" is defined as between 1-3 for righthanded bowlers and 1-2 for lefthanders. Hitting the pocket does not guarantee a strike but it is where experience dictates a strike is more likely. In fact, most strikes happen as a result of "good pin carry." Good pin carry is when the pins knock each one another over after the first one is hit by the ball. It is actually possible to have bad pin carry in which pins miss each other and remain (this happens most often when a bowler leaves a 5, 1-5, 2-8, 3-9, or 4-7-10, and many other combinations. The ball weights anywhere from about 10 pounds to 16 pounds and the pins weigh in at 4 pounds. So the ball can change course significantly after contact, while the pins fly off in all directions.
There is no reasonable way to predict the collision results. Bowlers who bowl a perfect 300 game often speak of being in the groove, which may refer to having a reproducible approach and release, but almost any 300 game has a least one "lucky" throw in it.
Amazing! I started using a 7 lbs ball but i made it a point to use heavier balls each game i play, and now im using an 11 lbs ball. Now i know the reasons behind all those power moves and deadly bowling styles, watch out on my next game haha