ballistic pendulum

英 美
  • 冲击摆,冲悔,弹道摆
  • ballistic adj.弹道的;(突然地)激动、沮丧或者生气的
  • pendulum n.摆锤;钟摆;摇摆不定
Noun:
  1. a physical pendulum consisting of a large mass suspended from a rod; when it is struck by a projectile its displacement is used to measure the projectile's velocity