
In the past, bowling ball motion was examined using visual analysis. That analysis led to the conclusion that bowling balls go through three distinct phases of motion, skid, roll, and hook, in that order; however, that conclusion was proven inaccurate when USBC Equipment Specifications and Certification department researchers examined the results of the
Bowling Ball Motion Study, which, through the use of equations and graphical data analysis, definitively proved that the actual progression is
skid,
hook and
roll.