volvo peak roof strength is 4.5mg, 那麽
F*t = delta(mv)
假定速度12 m/s,
12m = 4.5mg*t
t = 12/4.5g = 0.27 秒
就算衝力隨時間線性增加,隻要撞擊時間有半秒鍾,就沒有問題。
volvo peak roof strength is 4.5mg, 那麽
F*t = delta(mv)
假定速度12 m/s,
12m = 4.5mg*t
t = 12/4.5g = 0.27 秒
就算衝力隨時間線性增加,隻要撞擊時間有半秒鍾,就沒有問題。
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