Hi. Does anyone know of a proof that explains why you can't mix x and y components of vectors? For example you know how if you are solving a physics problem you have to break things up into x any y components (eg: velocity). My physics teacher wanted us to find a proof online that explained why you can't combine the x and y components of a velocity vector for example. I tried looking for a proof through google but i can't find one. So i wanted to know if any of you knew of a proof like this.
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