Overweight and underweight (id: 4d151274f)

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]
03.07: A 2 kg mass aew4 ,:d7rusmu n6a0gz is.zji;+p(i p gd a 4 kg mass on a horizontal frictionless surface are connectedjzz0s gii.i p+;6 (pga by 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 A on the 4 kg mass?

A. 72N
B. 48N
C. 24N
D. 6N
E. 3N


参考答案:  B


本题详细解析: 暂无

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