Wah!! 寫:加減速的說法是否能成立?
速度有上限, 但加減速的時間又是否有下限? 例如加減速所用的(相對於弟的)時間是否可以無限接近零呢?
若加速時間無限接近零,輸入的能量就趨於無限大,
但末速的極限仍然是光速。
The input energy should be the same no matter what acceleration he use.鄧登凳 寫:F=ma is Newtonian mechanicsWah!! 寫:F = ma
Why does it depend on energy???
For example, he may use a blackhole to swing back in short time.
It is proven that this is not correct when the speed concerned is a significant portion of the speed of light.
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