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Tastosis

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## Homework Statement

My teacher told me that this will be the general equation that we will be using. My question is how do I know what to cancel out given a problem? I don't even know what these variables mean.

I was absent during the intro of this lesson and I need a quick answer. Thanks!

## Homework Equations

K1 + Uel1 + Ugrav1 + Wothers = K2 + Uel2 + Ugrav2

½MV1^2 + ½KX^2 + mgy1 + Wothers = ½MV2^2 + ½KX2^2 + mgy2