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CANON007
ANSWERS: 1
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It's a point relative to a frame of reference. For instance you could pick an inertial frame of reference, like the stars (not really a true inertial frame of reference, but a good, practical one). But you could very well use any other frame of reference, like the Earth for example... To give you a geometric interpretation, a point is nothing more than the "tip" of a vector coming from a specific origin (the frame of reference). In physics, usually this point/position is a function of time (that is, it depends on time), to study the motion of a certain body as the time passes.
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