Give two eg of a situation in which the normal force on an object 's weight .Then give an eg of a situation in which there is NO normal force on an object .意思我也不清楚 能解答问题是最好不过的了会多给分 如果没有的话那
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Give two eg of a situation in which the normal force on an object 's weight .Then give an eg of a situation in which there is NO normal force on an object .意思我也不清楚 能解答问题是最好不过的了会多给分 如果没有的话那
Give two eg of a situation in which the normal force on an object 's weight .Then give an eg of a situation in which there is NO normal force on an object .
意思我也不清楚 能解答问题是最好不过的了会多给分 如果没有的话那帮我翻译下我也给分的昂 不许用谷歌等机械翻译!
Give two eg of a situation in which the normal force on an object 's weight .Then give an eg of a situation in which there is NO normal force on an object .意思我也不清楚 能解答问题是最好不过的了会多给分 如果没有的话那
结合图,这道题的原意是 ‘这个物体重150N,没有外力作用’ 并没问问题.但猜测问的应该是木块静止时倾斜角的大小,因为只有这一个未知量.临界角时μ=tanθ=0.30 ,θ=arctan0.30.楼主这题是原题吗感觉好像只是说到一半似的