我把物体放，在斜面上，增加倾斜角度，直到开始下滑。
So we're going to put a particular object on that incline and I'm first going to raise the Angle until it breaks loose.
测量摩擦系数有一种简单方法,把物体放置在斜面上,然后不断增加斜面的倾斜度,这是角α
It is fairly easy to measure a friction coefficient by putting an object on an incline and by changing the angle of the incline, increasing it This is the angle alpha.
在平行于放置被摄物体的位置上把有距离标尺的测试图表放置于一个斜面上。
Next to the parallel target, a patterned chart with a distance scale is placed on an incline.
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