gc textbook chapter 13 temperature and kinetic theory (id: a1545d1fc)

本题目来源于试卷: gc textbook chapter 13 temperature and kinetic theory，类别为 通用国际物理

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A 1.0-kg trash-can lid is suspended y/d 9x,srtkngz 2;b(geplo6rpf: /3 m3pgtv 7u ) l3pk5zdsn*against gravity by tennis balls thrown vertically upward at it. How many tennis balls per second must rebound fromt 7mk3npg p3 lfoprl 5p3*vs:/uz d6)e the lid elastically, assuming they have a mass of 0.060 kg and are thrown at 12m/s   balls/s

参考答案: 6.8±2%


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