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 separat j4ykx.8o r )*mnb*tpeed by 2.00 m, and ahjkzrtg sjz/ 4 7)z69k 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, aftez jzk4/sh76 rzjg9 )ktr which the right scale reads 30.0 kg and the left scale reads 50.0 kg. How far from the right 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
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