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an 80kg man jumps off a 60m cliff, halfway to the ground, his GPE is 27,072J. What is his KE at the same moment?

  • Physics -

    Half way down is 30 m down.
    Assuming the GPE reference is at the bottom of the cliff, then
    GPE=mg(30)=27072 J

    Equate GPE and KE.

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