Question

1. in this velocity vs. time graph, the person at point a: has negative acceleration has zero acceleration not enough information to determine.

Explanation:

In a velocity - time graph, acceleration is the slope of the velocity - time curve. If the graph at point A is a horizontal line (constant velocity), the slope (acceleration) is zero. Since the question is about a velocity - time graph and acceleration determination, and assuming the graph at point A has a constant velocity (implied by the options' context related to velocity - time graph analysis in physics), the acceleration is zero.

Answer:

has zero acceleration