本题目来源于试卷: Physics Unit4: Force Dynamics & Newton's Laws，类别为 通用国际物理
[单选题]
A student pulls a box of books on a smooth horizontal floor with a force sy5yuj+e w5i3 dv r19lof 10juq-1 :ezke33k1( )kkmp i ywhgxmu(.0 N in a direction of 37.0e above the horizontal. If the mass of the box and the bo(mz.p hu 3:kkmj1e) gkquk xiyw3-(1eoks is 40.0 kg, what is the normal force on the box?
A. $292 \; N$
B. $312 \; N$
C. $332 \; N$
D. $392 \; N$
参考答案: C
本题详细解析:
暂无
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