gc textbook chapter 11 Vibrations and Waves (id: e100ca8c3)

本题目来源于试卷: gc textbook chapter 11 Vibrations and Waves，类别为 通用国际物理

[问答题]
A tire swing hanging from a branch reaches nearly to the ground (j -3qhr+lh2q)ghebzcw vt.agg8/87k Fig. 11–48). 5lq,s f*7ps xkpkl j.2mg mq34How could you estimate the height of the branch usin gsq k3qxp2m s5 lmkl,j7f4p*.g only a stopwatch?

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