大学物理 ›› 2018, Vol. 37 ›› Issue (5): 28-29.doi: 10.16854 /j.cnki.1000-0712.170315

• 教学讨论 • 上一篇    下一篇

小球与均质自由杆碰撞中的瞬心

任才贵   

  1. 华东交通大学物理系,江西南昌330013
  • 收稿日期:2017-05-30 修回日期:2017-10-14 出版日期:2018-05-20 发布日期:2018-05-20
  • 作者简介:任才贵(1971—),男,江西丰城人,华东交通大学物理系副教授.

The instantaneous center of a sphere in collision with a homogeneous free rod

REN Cai- gui   

  1. Department of Physics,East China Jiaotong University,Nanchang,Jiangxi 330013,China
  • Received:2017-05-30 Revised:2017-10-14 Online:2018-05-20 Published:2018-05-20

摘要: 结合小球与均质自由杆的完全弹性碰撞、完全非弹性碰撞以及一般非弹性碰撞结果,指出球、杆碰撞问题中杆的瞬心的存在,证明了该瞬心位置的唯一性.并从力学原理上对瞬心做出解释.

关键词: 碰撞, 一般非弹性碰撞, 弹性度, 瞬心

Abstract: Combining with the complete elastic collision,completely inelastic collision and general inelastic collision results of the ball and the homogeneous free rod,we point out the existence of the instantaneous center of the rod in the collision of the ball and the rod and prove the uniqueness of the instantaneous position.The instantaneous center used in the principle of mechanics is explained,too.

Key words: collision, inelastic collision, elasticity degree, instantaneous center