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《物理教师》1986年第3期登载了《超级球问题》译文。文章大意是:如在特别大的球上放一个特别小的球,然后把这两个球移到距地h高的地方,释放它们。这时戏剧性的事件发生:当两个超级球中的大球撞击到地面上时,小球脱离大球,并升高到9倍于h高的地方。有的同志对《超级球问题》一文提出异议,认为:①在两球下落过程中,它们始终是互相接触的,所以当大球和地面碰撞后向上反跳时,没有理由说,小球仍保持原来的速度v向下运动;②根据弹性碰撞的特点,碰撞前后系统的总动能不应有所改变。
The physics teacher published the translation of the issue of Superball in the third issue of 1986. The main idea of the article is: If you put a particularly small ball on a particularly large ball, then move the two balls to a place higher than the floor h and release them. The dramatic event happened at this time: When the big ball of two super balls hit the ground, the ball detached from the big ball and raised to 9 times the height of h. Some comrades objected to the article on “Superball Questions.” They believed that: 1 In the course of the fall of the two balls, they always contacted each other, so when the big ball collides with the ground and rebounds upward, there is no reason to say that the ball still Keep the original speed v and move down. 2 According to the characteristics of elastic collision, the total kinetic energy of the system before and after the collision should not be changed.