本题目来源于试卷: Physics Unit9: Static Equilibrium, Elasticity and Fracture，类别为 通用国际物理
[单选题]
Two telephone poles are separated by 40 m and /a)e rcsurm4( connected by a wire. A bird of /qimm+8g 6ze z/j5 0emxaoh:jmass 0.50 kg lands on the wire midway between the poles, causing the wire to sag 2.0 m below horizontal. Assuming the wire has negligible mass, what is the tension in the wire?m5moj exgz8hj/:e 0a+m6iqz /
A. $6.2 \; N$
B. $12 \; N$
C. $25 \; N$
D. $50 \; N$
参考答案: C
本题详细解析:
暂无
| 
