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 scales are separated by 2. +lb0o)l v2i.xzlaui4000w8q3xtk2 v pu m, and a plank of mass 4.00 kg is placed between them. Each scale is observed to read 2.00 kg. A person now lies on the plank, after which the right scale reads 30.0 kg and the left scale reads 50.0 kg. How far from the tvp2x0 w k3qu8right scale is the person's center of gravity located?
A. $1.20 \; m$
B. $1.23 \; m$
C. $1.26 \; m$
D. $1.30 \; m$
参考答案: C
本题详细解析:
暂无
| 
