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

a little boy, with a mass of 40 kg, gets in his sled and slides down from the top of a 30 m high snowy slope. he reaches the bottom of the hill with a speed of 20 m/s. was the hill frictionless and if not, how much work was done by friction while the boy was sliding?

3. The attempt at a solution

all i can do is draw what is happening i don't know what equations to start with

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# Homework Help: Work and friction?

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