本题目来源于试卷: gc physics textbook chapter 4 problems，类别为 通用国际物理
[问答题]
Why might your foot hurte9 zgy*sjb9q4s6 c6 lj if youn p9y,jf i1q4p kick a 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.
本题详细解析:
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