Sagot :
C. When describing motion, a frame of reference is a system of reference points used to determine position and velocities of objects.
What is frame of reference?
A frame of reference is an arbitrary set of axes with reference to which the position or motion of something is described or physical laws are formulated.
What is the importance of frame of reference?
Frame of reference serves a valuable purpose, because it enables us to make more accurate measurement of our position, displacement, velocity and the total distance traveled.
Also, a frame of reference consists of an abstract coordinate system and the set of physical reference points that uniquely fix the coordinate system and take measurements within that frame.
In other words, it is a system or base, on which motion of an object is determined.
Thus, when describing motion, a frame of reference is a system of reference points used to determine position and velocities of objects.
Learn more about frame of reference here: https://brainly.com/question/1707361
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