[題目] 功與能
[領域]力學 (題目相關領域)
[來源] 習題 (課本習題、考古題、參考書...)
[題目]For a rocket moving vertically in the presence of gravity, what is its speed
in terms of
its mass m at time t? Here, we assume that its mass is initially m0 and the
exhaust
speed of the gas relative to the rocket is constant u
[瓶頸]考慮重力就解不下去了 (寫寫自己的想法，方便大家為你解答)
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