本题目来源于试卷: Physics Unit4: Force Dynamics & Newton's Laws，类别为 国际高中通用物理
[单选题]
A student pulls a box of books on a smoo;k9 f-s33oij o c4ucyvth horizontal floor with a foatz0wo y) 85f:rakwm.rce of 100 N in a direct k.8f:wmr t5)a ow0azyion of 37.0e above the horizontal. If the mass of the box and the books 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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