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近代科技中火箭、喷气飞机、反击式水轮机等均是反冲运动的实际应用.本文力图用浅显的方式介绍有关反冲运动的速度等问题.常见的反冲运动有两种典型的形式:一种是爆炸式的反冲运动,如大炮发射时炮身的后退、爆竹第一响的弹升.另一种是连续喷射式的反冲,如火箭发射时燃体连续喷发,火箭冉冉升空.现在提出这样的问题:两枚质量相同均为M.的火箭,内装有相同质量m的燃料,在没有重力和阻力的自由空间,以两种不同的方式-一种是瞬时爆炸式的发射,另一种是连续喷射式
In modern science and technology, rockets, jet planes, counter-attack turbines and so on are all practical applications of recoil movement. This article attempts to introduce the issues of speed and other issues related to recoil movement in a simple way. Common recoil movements have two typical forms: This is an explosive recoil movement, such as the retreat of the cannon when the cannon is fired, the first shot of the firecrackers. The other is a continuous-jet recoil, such as continuous firing of the rockets when the rockets are fired, and rockets erupt into space. The question is now raised: two rockets of the same mass M., containing fuel of the same mass m, in the free space without gravity and resistance, in two different ways - one is an instantaneous explosive type of launch, The other is continuous jet