本题目来源于试卷: newnewnewnew，类别为 IB物理学
[问答题]
A person exerts an upwabsjfm1e 7;+h9 zolu* yrd force of 40 N to holmb 2)gh4s5 hqv8ctu;g-ycc7 gd a bag of groceries. Describe the “reaction” force (Newton’s third law) by stating (a) its magnitude, (b) its direction, (c) onscu5gcg;qb h2h) 4cmvg-t8y 7 what object it is exerted, and (d) by what object it is exerted.
参考答案: (a) The magnitude is 40 N. (b) The direction is downward. (c) It is exerted on the person. (d) It is exerted by the bag of groceries.
本题详细解析:
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