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# Vectors Watch

1. I understand how to add/subtract etc with vectors, however i don't understand why should it strictly be tail to head ? for instance if we have vector A and B we would go about adding them by placing them tail to head from other, but why should be in this format why can't it be for instance tail to tail?
2. A vector carries direction with it, if you were to try add vectors tail to tail you would be subtracting one of them as it would be in the wrong direction (multiplied by -1)
If you draw the diagram of two vectors head to tail and then tail to tail you would see they represent different things.
3. Because the whole vector concept encompasses magnitude AND DIRECTION i.e. size AND direction; if you draw the vectors any other way than prescribed, the direction would be erroneously altered.

Updated: October 13, 2016
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