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  • 動摩擦系數(shù)0.4,先從50m坡上滑下,再上30m坡,再滑下,求回到平面后的滑行距離,質(zhì)量為210kg.

    動摩擦系數(shù)0.4,先從50m坡上滑下,再上30m坡,再滑下,求回到平面后的滑行距離,質(zhì)量為210kg.
    A bobsled run leads down a hill as sketched in the figure above.Between points A and D,friction is negligible.Between points D and E at the end of the run,the coefficient of kinetic friction is sub>k = 0.4.The mass of the bobsled with drivers is 210 kg and it starts from rest at point A.
    Find the distance x beyond point D at which the bobsled will come to a halt
    英語人氣:321 ℃時間:2020-06-13 15:16:06
    優(yōu)質(zhì)解答
    如果圖是按我理解那樣的話,
    mgh=mgu*s
    s=h/u=125m
    我來回答
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