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18 March, 09:48

A 0.5kg bird has a PE of 137.2 J. What height is its perch?

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Answers (2)
  1. 18 March, 10:07
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    mgh

    137.2=.5x10xh

    137.2/5=h

    ~140/5=28metres approx ... tweet tweet
  2. 18 March, 11:25
    0
    PE = mgh

    137.2 =.5*9.8*h

    h=137.2 / (.5*9.8)
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