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The correct answer is frame of reference
How is motion measured ?
Motion is a simple idea to grasp, but depending on the degree of detail required, it might turn out to be a fairly difficult item to calculate. Motion may be defined simply as the measurement of movement in a certain direction. Several forces, including mass, friction, velocity, and distance, must be understood in order to determine movement and direction.
An item must move in order to measure motion. Starting from one position in space and terminating at another is what is meant by this definition. Though time is not required to show motion, it is sometimes added to the calculation of speed to account for the time needed to go from one location to another. In theoretical mathematics, movement is typically represented as an x-y cartesian graph.
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