Typical Forces (id: 97d7f9916)

本题目来源于试卷: Typical Forces，类别为 美国物理杯赛(Physics Bowl)

[单选题]
08.20: A person pushes a block of mas ,hq3w3 p .qyphux)x:rs M=6.0 kg with a cqt, ije1ed 6/a1d:jy :td6ycponstant speed of 5.0 m/s straight up a flat surface inclined:6c j1:e qj1,ey6p ddt/t ayid $30^{\circ}$above the horizontal. The coefficient of kinetic friction between the block and the surface is μ = 0.40. What is the net force acting on the block?

A. 0N
B. 21N
C. 30N
D. 51N
E. 76N


参考答案:  A


本题详细解析: 暂无

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