gc textbook chapter 7 Linear Momentum (id: 7a803cbe4)

本题目来源于试卷: gc textbook chapter 7 Linear Momentum，类别为 通用国际物理

[填空题]
A constant friction force og/fhjrm c2/2((rn e ukz8(ufof 25 N acts on a 4uxrwa h;9lxj-wxn-vp*+ rr6 65-kg skier for 20 s. What is the skier’s changevxrnwxx9h*jw- a 4r+6-;lu p r in velocity?    m/s

参考答案: -7.7±2%


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