(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

75 kg boy, starting from rest, slides down a 30 degrees hill htat is 70 m long. He arrives a thet bottom with a speed of 15 m/s. How much thermal energy has been shared btwn the surface of the hill and the seal of his pants

2. Relevant equations

d=(vf2-vi2)/2a

KE=1/2Mv2

change of ENERGYsystem=constant

PEi +KEi=PEf + KEf

PE=Mgh

3. The attempt at a solution

I have no clue to figure this out....please help by explaining the steps..Many thanks!

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# Homework Help: Energy probl

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