This simulation models a scenario where a bullet is shot at a velocity Vb into a pendulum, based upon the ballistic pendulum devised by English mathematician Benjamin Robins in 1742.

此程式模擬一顆以速度Vb的子彈射入一擺錘的運動過程，同理於西元1742英國數學家羅賓斯所設計的子彈測速儀器模型。