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physics

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Jill runs 100 m in 15.0 s. Jon speedwalks 100 m in 30.0 s. If Jill and Jon have the same mass, then Jill's kinetic energy would be

  • physics -

    Jill
    (1/2) m (100/15)^2

    Jon
    (1/2) m (100/30)^2

    Jill/Jon = 30^2/15^2 = 4

    Jill's ke = 4 time Jon's

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