For an object to be moving in one direction means that it can only move in 2 ways. It can only move one way or another. It cannot go any other way in 1 dimension.
Yes the real life motion changes because it's being compared to a different thing. It is being described or seen in relation to the different axis.
If an object has a negative velocity it only means that its moving backwards, therefore having negative speed. With positive velocity it will be moving forwards.
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1 comment:
OK 3/4
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