[单选题]
A student pulls a box of w iho-ci..yb(r1a2x q3z 8(vvxy;yr2fmia1; lxx.om books on a smooth horizontal floor with a force of 100 N in a direction o;m i1r v v;xx2oy(flazy.38mxf $37^{\circ}$ above the horizontal. If the mass of the box and the books is 40.0 kg, what is the acceleration of the box?
A. $1.5 \; m/s^2$
B. $1.9 \; m/s^2$
C. $2.0 \; m/s^2$
D. $3.3 \; m/s^2$
参考答案: C
本题详细解析:
暂无
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