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]
03.06: A 2 kg mass and a 4 kg m ,z17np+-ttrf)y u ngcw g/ 4op h0ly(jass on a horizonta k -nng/.fk osj09el1zev.h2al frictionless surface are connected 1-eksnk.a /nljoz 0.9h e2f gvby a massless string A. They are pulled horizontally across the surface by a second string B with a constant acceleration of $12\; m/s^{2}$ .
What is the magnitude of the force of string B on the 2 kg mass?
A. 72N
B. 48N
C. 24N
D. 6N
E. 3N
参考答案: A
本题详细解析:
暂无
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