试题与答案

如图,一固定斜面上两个质量相同的小物块A和B紧挨着匀速下滑,A与B的接触面光滑。

题型:不定项选择

题目:

如图,一固定斜面上两个质量相同的小物块A和B紧挨着匀速下滑,A与B的接触面光滑。已知A与斜面之间的动摩擦因数是B与斜面之间动摩擦因数的2倍,斜面倾角为α,B与斜面之间的动摩擦因数是

[ ]

A.

B.

C.tanα

D.cotα

答案:

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