On a billiard table, the COR for the impact between a ball and any of the four bumpers should be the same. Assuming that this is the case, determine the angle after two banks as a function of the initial incidence angle \alpha .
On a billiard table, the COR for the impact between a ball and any of the four bumpers should be the same. Assuming that this is the case, determine the angle after two banks as a function of the initial incidence angle \alpha .