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A 15.0 kg child descends a slide 2.8m high and reaches the bottom with a speed...

A 15.0 kg child descends a slide 2.8m high and reaches the bottom with a speed of 2.3 m/s. How much thermal energy due to friction is generated in this process?
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Answer #1

By conservation of energy...

PE = KE + Thermal Energy

mgh = .5mv2 + TE

(15)(9.8)(2.8) = (.5)(15)(2.3)2 + TE

Thermal Energy = 372 J

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