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

[填空题]
A 1.0-kg trash-can lid is suspended aga0 ut1o b1eh9o k3:8 .3cr1tqda3 jbh6qqgojrqi:mpqid jb /64gnst gravity by tennis balls thrown vertically upward at it. How many tennis balls per second must rebound from the lid elastically, assuming they have b4gj:m q/i pd6a mass of 0.060 kg and are thrown at 12m/s   balls/s

参考答案: 6.8±2%


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