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college physics

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A 22.1 kg child descends a slide 3.4 m high and reaches the bottom with a speed of 2.4 m/s. How much thermal energy due to friction was generated in this process? I'm not sure where to even start this problem. Please help.

  • college physics -

    consider energy
    Initial PE= final KE+frictionworkdone.
    mgh=1/2 mv^2+frictionworkdone

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