gc physics textbook chapter 6 problems (id: c957dd3c0)

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 145-g baseball is dropped -*,yi)lzf r/wsbkd/isz *om1fromg;il0 pe 7a 7cf.e0igx a tree 13.0 m above the ground.
(a) With what speed would it hit the ground if air resistance could be ignored?    m/s
(b) If it actually hits the ground with a speed of 8m/s what is the average force of air resistance exerted on it?    N

参考答案:
空格1: 16±2%  空格2: 1.06±2% 


本题详细解析:

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