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 heavy boy and a light girl arz2fbj ;jd(h(yh.m u g /3+xntfx16sdze balan y/ihna rkv4 -/,il 9q)wwjfu3hp09xcced on a massless seesaw. If they both move forward so that they are one-half their original distance from the pivot point, what will happe-krhvcf )409 pyu inw/i3q9awl,x/jhn to the seesaw?
A. The side the boy is sitting on will tilt downward.
B. The side the girl is sitting on will tilt downward.
C. Nothing, the seesaw will still be balanced.
D. It is impossible to say without knowing the masses and the distances.
参考答案: A
本题详细解析:
暂无
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