Im wondering how do we know when to substract Kinetic engery from potential engery or when do we add them?(adsbygoogle = window.adsbygoogle || []).push({});

Is that making sense?

question is asking:

a women skis downhill at a constant speed of 8.0 m/s when she reaches an icy patch on which her skis move with negligible friction. If the icy patch is 10 m high, what is the skier's speed at its bottom?

the book says to use this formula:

KE2=KE1 + PE

why are adding kinetic and potential together? I understand how to manipulate the equaiton to solve for speed but why are we using this formula?

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# Homework Help: Kinetic engery

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