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college physics

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A 1.3 g spider is dangling at the end of a silk thread. You can make the spider bounce up and down on the thread by tapping lightly on his feet with a pencil. You soon discover that you can give the spider the largest amplitude on his little bungee cord if you tap exactly once every 3 seconds.
What is the approximate spring constant of the silk thread?

  • college physics -

    Isn't f=1/2PI * sqrt(k/M)

    f, of course, is 1/period

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