gc physics textbook chapter 6 problems (id: 5447073e7)

本题目来源于试卷: gc physics textbook chapter 6 problems，类别为 IB物理学

[填空题]
A 1300-N crate rests on the flo+*o wsi(/bm asor.cu gw/5fb(/42 s+g mno:fvwf c How much work is required to move it at constant speed (a) 4.0 m along the floor against a friction force of n45ug/ f(owc/ b:wfv2gcms f+ 230 N,    J
(b) 4.0 m vertically?    J

参考答案:
空格1: 920±2%  空格2: 5200±2% 


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