本题目来源于试卷: Physics Unit9: Static Equilibrium, Elasticity and Fracture，类别为 国际高中通用物理
[单选题]
A heavy boy and a light girl aro 8 a/ cvniq7:qh19ooke balanced otls1iu 1 bynujfb3)j: dhl)0;rp 3g8un a massless seesaw. If they both move forwuyf;1i:0nu udtl )3l1spb)r3 gj8j bh ard so that they are one-half their original distance from the pivot point, what will happen 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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