Velocity remains constant in a moving object with no external forces acting on it according to Newton's first law.
Velocity is the characteristic of a moving object that would remain constant according to Newton's first law when no external forces act on it. Velocity includes both speed and direction, emphasizing that the object will continue moving at a constant rate in a straight line unless influenced by an external force.
For example, if a car travels at 60 mph due north on a frictionless road and no external forces intervene, it will maintain this speed and direction indefinitely, following Newton's first law.
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