本题目来源于试卷: Typical Forces,类别为 美国物理杯赛(Physics Bowl)
[单选题]
01.12: If the block is placed on a second plane (whe cg rus8tne1 hg-u +.z*re friction i v3 :feno8puk8 g yzk7+s significant) in inclined at the same angle, it will begin to accelerate at 2.0 m/s. What is the force of frict g 37+ kuv8kf 8nzo:eypion between the block and the second inclined plane?
A. 10N
B. 15N
C. 25N
D. 43.3N
E. 50N
参考答案: B
本题详细解析:
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