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  • 英語(yǔ)翻譯

    英語(yǔ)翻譯
    A dock worker loading crates on a ship finds that a 12 kg crate,initially at rest on a horizontal surface,requires a 69 N horizontal force to set it in motion.However,after the crate is in motion,a horizontal force of 54 N is required to keep it moving with a constant speed.
    The acceleration of gravity is 9.8 m/s2 .Find the coefficient of static friction between crate and floor.
    Find the coefficient of kinetic friction.
    英語(yǔ)人氣:740 ℃時(shí)間:2020-02-05 19:50:56
    優(yōu)質(zhì)解答
    工人發(fā)現(xiàn)裝載在船上箱子重12kg,最初靜止在水平表面上,需要 69 N 的水平力使他移動(dòng).然而,箱子都在運(yùn)動(dòng)后,54 N的水平力就能使他勻速移動(dòng).
    重力加速度的是 9.8 m/s2.求到箱子和地板之間的靜摩擦系數(shù).Find the coefficient of kinetic friction.求動(dòng)摩擦系數(shù)
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