Overweight and underweight (id: 0030e557c)

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]
96.30: An 800-kg elevator acceleor6 1sn 1rk(dkjel03d1ick +qrates downward4q: i3 a.frodm at$ 2.0\;m/s^{2}$ . The force exerted by the cable on the elevator is:

A. 1.6 kN down
B. 1.6 kN up
C. 6.4 kN up
D. 8.0 kN down
E. 9.6 kN down


参考答案:  C


本题详细解析: 暂无

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