英语翻译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
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英语翻译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
英语翻译
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.
英语翻译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
工人发现装载在船上箱子重12kg,最初静止在水平表面上,需要 69 N 的水平力使他移动.然而,箱子都在运动后,54 N的水平力就能使他匀速移动.
重力加速度的是 9.8 m/s2.求到箱子和地板之间的静摩擦系数.
12kg货物放在水平面上，69N的力能让它移动，移动后54N的力就可以保持匀速，重力加速度取9.8m/s2，求货物与地面间静摩擦系数
码头工人板条箱装在船上发现12公斤重的箱子，最初在休息在一个水平面上，需要一个69 N的水平力，它集运动。然而，后箱是运动，水平力54 N是需要保持在一个恒定的速度运动。
重力加速度为9.8 m/s2。找到箱与地面之间的静摩擦系数。
发现的动摩擦系数。...
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码头工人板条箱装在船上发现12公斤重的箱子，最初在休息在一个水平面上，需要一个69 N的水平力，它集运动。然而，后箱是运动，水平力54 N是需要保持在一个恒定的速度运动。
重力加速度为9.8 m/s2。找到箱与地面之间的静摩擦系数。
发现的动摩擦系数。
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