大学物理 ›› 2012, Vol. 31 ›› Issue (5): 5-5.

• 著者文摘 • 上一篇    下一篇

一排高度依次增加的骨牌倒下过程中的能量传递问题

虎伟   

  1. 北京师范大学物理系,北京100875
  • 出版日期:2012-05-25 发布日期:2012-05-20

The energy transformation of a row of dominoes gradually increasing in height falling in sequence

  • Online:2012-05-25 Published:2012-05-20

摘要: 对排成一排但高度不断增加的多米诺骨牌在顺次倒下的过程中,总的重力势能不断减小,其中一部分重力势能转化为下一个骨牌倒下的转动动能.通过运用角动量定理发现,骨牌倒下的转动动能和之前系统的能量转化有一定的关系,而骨牌倒下的条件由彼此相邻的两个骨牌之间的间距、高度及后一张骨牌获得的角速度决定.

关键词: 多米诺骨牌, 高度, 能量传递, 高度限制

Abstract: A row of "dominoes" gradually increasing in height falling in sequence after the first is displaced,in which the total gravitational potential energy of system decreases and a part of gravity potential energy is transferred into the rotational kinetic energy of next domino.The rotational kinetic energy of falling domino has a certain relationship with the system energy transformation according to the angular momentum theorem.The condition of dominoes falling is determined by space,height of two adjacent dominoes and the angular velocity of next domino.

Key words: dominoes, height, energy transformation, height limit

中图分类号: 

  • O313.3