Overweight and underweight (id: 106816e5e)

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 surfac bg95ozj-8-sxb f7e:yyr uv u(e are cauv,t5(c bdjn5,ubv6/p o ; hdonnected by a massless string A. They are pulled horia(b , /u5ot,h ncbvv5d6p;d juzontally across the surface by a second string B with a constant 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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