“超级球”在水平板上一次碰撞弹回现象的研究

A Study on the Collision and Rebound of “Super Ball” on Horizontal Plates

通过理论推导和实验探究,阐述了"超级球"与水平板发生一次碰撞后速度与角速度的变化规律,从平板的粗糙程度和"超级球"入射方式研究,找到影响"超级球"弹回的主要因素为球板间的摩擦力和角速度方向。并得出均质超级球只有在下旋入射且与粗糙水平板一次碰撞后线速度与角速度及半径R满足v_(1x)/ω_1<8R/3e_x+5时才会弹回,同时分析了其他条件下不能弹回的原因。

Based on the theoretical derivation and experimental verification,the variation rules of the velocity and angular velocity of“super ball”after colliding with the horizontal plate are expounded.From the research of the roughness of the plate and the“super ball”The main factor of bounce-back is the friction and angular velocity between the plate and the ball.lt is found that the homogeneous“super ball”only bounces back When the friction coefficient satisfies v1x/w1<8R/3ex+5and analyzes the reason why the“super ball”can’t bounce back under other conditions.