本题目来源于试卷: Typical Forces，类别为 美国物理杯赛(Physics Bowl)
[单选题]
11.12: A 5.0 kg mass moves along the -w5znym.bm/s6m dp ( dx-axis, vpl7+-t8ov8 db p( y/n8tdpblat one instant of time, the mass has position 2.0 m, velocity 3l y l7p8dpd(8nvbtvbo p+t/-8.0 m/s,and acceleration $4.0\;m/s^{2}$ . What is the net force acting on the mass at this instant of time?
A. 0 N
B. 10.0 N
C. 15.0 N
D. 20.0 N
E. 22.5 N
参考答案: D
本题详细解析:
暂无
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