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1·Recoil energy measuring system of a underwater launcher is formed by means of horizontal recoil device, electromagnetic velocity sensor, measuring amplifier, transient waveform recorder and computer.

利用卧式后坐装置、磁电式速度传感器、测量放大器、瞬态波形记录仪及计算机组建了一套水下发射装置后坐能量测试系统。

2·Because of the light mass, the recoil effect is strong after the particle is emitted, so the recoil effect is must taken into account to maintain the energy balance.

由于轻核质量轻，发射粒子后反冲效应很强，理论计算中还严格考虑了反冲效应的影响，从而保证了能量守恒。

3·A theorem on kinetic energy for variable mass-point and formula of work of recoil internal forces are given and the reason of soft-rope query is discussed.

给出变质量质点的动能定理和一对反推内力作功的表达式，并由此给出软绳问题的正确解释。