本题目来源于试卷: Overweight and underweight,类别为 美国物理杯赛(Physics Bowl)
[单选题]
03.08: A 2 kg mass and a 4 kg mass on a horizontal frictionless surf bdqnou)m pq mt)(di (bx0zkf,* , ct-6a e h;yus)6i c2tfz7,irce are connected by a massless string A. They are pulled horizontally across the surface by a second string B with a const z 2i6ihyru,tec ;s)7f ant acceleration of $12\; m/s^{2}$ .
What is the magnitude of the net force on the 2 kg mass?
A. 72N
B. 48N
C. 24N
D. 6N
E. 3N
参考答案: C
本题详细解析:
暂无
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