Physics

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A child who has a mass of 17 kg slides down a slide from a height of 3.3 m. If friction does a non-conservative work of -143 J, what is the speed (in m/s) of the child at the bottom of the slide? The acceleration due to gravity is 9.81 m/s2

  • Physics -

    final KE= initialPE-frictionenergy
    1/2 m vf^2=m g 3.3 - 143

    calculate vf

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