Experiment of the Boat by Tsiolkovsky 船的實驗 (齊奧爾科夫斯基) edit
為了理解火箭推進的原理，康斯坦丁·齊奧爾科夫斯基提出了一個著名的“船的實驗”。有人在遠離海岸的船上，上面並沒有槳。這人想到達海岸。且注意到船上裝載了一定數量的石頭，於是將這些石頭一個接一個盡快地扔向與海岸相反的方向。結果，向一個方向投擲石塊的動量，有效地讓船以相同的動量往另一個方向移動。
In order to understand the principle of rocket propulsion, Konstantin Tsiolkovsky proposed a famous experiment "of the boat". A person is in a boat away from the shore without oars. She wants to reach this shore. She notices that the boat is loaded with a certain quantity of stones and has the idea of throwing, one by one and as quickly as possible, these stones in the opposite direction to the bank. Effectively, the quantity of movement of the stones thrown in one direction corresponds to an equal quantity of movement for the boat in the other direction.