回复：你那个方程唯一有效的时候是引擎和车轮都是静止的时候才有效

来源: ifidonlike 于 2005-12-08 21:18:51 [] [旧帖] [给我悄悄话] 阅读数 : (324 bytes)
回答: 你还不明白，能量守恒！ 由 ifidonlike 于 2005-12-08 18:13:12

Well, The "hint" was given to you for comparing which one is bigger between 700*5000/r and 560*7500/r. the unit doesn't have to be an "entity". I didn't tell you that's the exact the formula, rather giving you the idea of considering rpm as well. After all, rpm*torque has something to do with Energy in a given time.

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