本题目来源于试卷: Physics Unit6: Work and Energy，类别为 通用国际物理
[单选题]
A 2.0-kg mass is relea 0c/f) ;edlvfzsed from rest f9vhmipme.s**h lf00 at the top of a plane inclined at 20e above horizontal. The coefficient of kinetic friction between the mass and the plane is 0.2 vs9f mm*ie0f*p0hlh. 0. What will be the speed of the mass after sliding 4.0 m along the plane?
A. 2.2 m/s
B. 3.0 m/s
C. 3.5 m/s
D. 5.2 m/s
参考答案: C
本题详细解析:
暂无
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