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 and a 4 5lkm 56af75dy yds(paj.z0j rkg mass on e:xr6tq uaek84/l 9zd a horizontal frictionless surface are connected by a massless string A. They are pulled horizontally across the surface b4uked aql trx /e6:z98y 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

微信扫一扫，分享更方便