? asked in 社會與文化語言 · 1 decade ago

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a car starts from rest and accelerates uniformly for 200m. it moves at constant speed for 160m and then decelerates to rest in 50m. the whole trip takes 33s. how long did it move at constant speed?

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  • 1 decade ago
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    一輛汽車從停止到開始 從200m開始加速。

    它以 160m 的速度持續的移動 然後減速 在 大約50m 中停止。

    整個的行程使用了 33 s(秒)。 他以這樣移動的速率是多少?

    Source(s): 自己
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