User: What is instantaneous acceleration? A. how fast a speed is changing at a specific instant B. how fast a velocity is changing at a specific instant C. how fast a direction is changing at a specific instant D. all of the above

Weegy: D. all of the above. Is the rate of a tangent to the slope of a graph signifying velocity versus time. It is a snapshot of acceleration at a precise moment in time based on the relative changes in velocity over time. [ It is the limit of acceleration for any given point within the displacement vector. ]
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