Question

define instantaneous velocity
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Answer 1

THE PHYSICAL VELOCITY OF A BODY IN A POINT, OR INSTANTANEOUS VELOCITY, IS THE VELOCITY THE BODY HAS AT A SPECIFIC TIME IN A PARTICULAR POINT OF ITS TRAJECTORY. INSTANTANEOUS VELOCITY, OR SIMPLY VELOCITY, IS DEFINED AS THE LIMIT OF THE AVERAGE VELOCITY WHEN THE TIME CHANGE APPROACHES ZERO.

Answer 2

The physical velocity of a body in a point, or instantaneous velocity, is the velocity the body has at a specific time in a particular point of its trajectory.