Bowling has been a favorite past time for so many for so long. It is a sport that unites people from all parts of the world. Though the techniques may vary, some more unorthodox then others, some with spin, some with a simple flick of the wrist, the physics behind it is ever present.
Most standard bowling balls have weights in them, but there are two major types, symmetric and asymmetric. Though they perform very similarly, the asymmetric weights give the bowlers a little more tweak in their shot.
Getting curve on the ball is an important aspect of the game. This has a lot to do with the angular velocity of the ball. As the ball goes down the lane, the angular velocity changes and in turn, the ball starts to curve due to the force of friction of the ball on the lane
The difference in the weights has to do with how the axis of rotation goes through the weights. the direction and placement of the axis has to do with the moment of inertia. the different moments of inertia affects how the ball will go down the lane.