作者yuhsuan0103 (Ichiro)
看板Physics
标题[题目] 功与能
时间Wed Apr 1 01:01:44 2009
[领域]力学 (题目相关领域)
[来源] 习题 (课本习题、考古题、参考书...)
[题目]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
[瓶颈]考虑重力就解不下去了 (写写自己的想法，方便大家为你解答)
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