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admin 发表于 2024-10-9 22:55:01 | 显示全部楼层 |阅读模式
本题目来源于试卷: newnewnewnew,类别为 IB物理学

[问答题]
Why might your foot hurt if you kjkctx9 8.5y+bimfbwl hmq-4 2ick lx8y /u:sqjgic j5(*5ti87a ,ockzyma heavy desk or a wall?




参考答案:
By Newton’s 3rd law, the desk or wall exerts a force on your foot equal in magnitude to the force with which you hit the desk or wall.  If you hit the desk or wall with a large force, then there will be a large force on your foot, causing pain.  Only a force on your foot causes pain.


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