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In physics it is very common to use a Cartesian System of Coordinates as a frame of reference. A Cartesian System of Coordinates is a system with two or more axes, in physics we usually use two axis or three axis systems. Each axis represents a dimension, for example in a two axis system, one axis is vertical and the other is horizontal. In each axis there is a scale, with units. Every measurement of the distance of an object in space is relative to another. This means that it is the measurement of the distance from one point to another. But, what happens when we don't have anything to measure the distance from? This is when we use the system of coordinates, we measure the distance from the center of the of the system.
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