Vibrations and Waves (id: 4ebe4e856)

本题目来源于试卷: Vibrations and Waves，类别为 IB物理学

[填空题]
A 220-kg wooden raft floats on a lake.lul a0:4jt ,lu When a 75-kg man stalf 8a2 p/go,llnds on the raft, it sinks 4.0 cm deeper into the water. When he steps off, the raft vibra /,o8gal llfp2tes for a while.
(a) What is the frequency of vibration?(round to one decimal place) $\approx$    Hz
(b) What is the total energy of vibration (ignoring damping)?(Round to the nearest intege) $\approx$    J

参考答案:
空格1: 1.5±2%  空格2: 15±2% 


本题详细解析:

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