Question

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

Explanation:

In a velocity - time (v - t) graph, the acceleration of an object is given by the slope of the velocity - time graph, i.e., \(a=\frac{\Delta v}{\Delta t}\). At a single point (like point A) on a v - t graph, we can find the slope of the tangent to the curve at that point. But since the problem doesn't provide the shape of the v - t graph around point A (for example, whether the graph is a straight line, a curve, etc.), we don't have enough information to determine if the acceleration is positive, negative, or zero.

Answer:

Not enough information to determine.