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]
A boy and a girl are balanced on a massless seesaw. Thu. jpa 7xn.+ewe boy wej sx*d5b,e0a- n,d 0cqhi t;has a mass of 75 kg and the girl's mass is 50 kg. If the boy sits 2.0 m from the pivot point on one side of the seesaw, where must the gi,,sq 0 xwh0net-*5ja ;edicdbrl sit on the other side?
A. $1.3 \; m$
B. $2.3 \; m$
C. $2.5 \; m$
D. $3.0 \; m$
参考答案: D
本题详细解析:
暂无
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