newnewnewnew (id: ec7e719b8)

本题目来源于试卷: newnewnewnew，类别为 IB物理学

[填空题]
A 65$-\mathrm{kg}$ ice skater coasts with no effort for 75 m until she stops. If the coefficient of kinetic friction between her skates and the ice is $\mu_{\mathrm{k}}=0.10$ , how fast was she moving at the start of her coast?   

参考答案: 12±2%


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