1.motion, in physics, change with time of the position or orientation of a body. ... In both cases all points in the body have the same velocity (directed speed) and the same acceleration (time rate of change of velocity). The most general kind of motion combines both translation and rotation.
2.A reference point is a place or object used for comparison to determine if something is in motion. An object is in motion if it changes position relative to a reference point.
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Explanation:
1.motion, in physics, change with time of the position or orientation of a body. ... In both cases all points in the body have the same velocity (directed speed) and the same acceleration (time rate of change of velocity). The most general kind of motion combines both translation and rotation.
2.A reference point is a place or object used for comparison to determine if something is in motion. An object is in motion if it changes position relative to a reference point.
Answer: