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- 6如图所示,在倾角θ=30°的粗糙斜面上放一物体,重为G.现用与斜面底边平行的力F=G/2推物体,物体恰能在斜面上做匀速直线运动,则物体与斜面间的动摩擦因数为 _ .
- 7Your eyes singing the song is not
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