Question

the graph above represents the motion of a student walking on a sidewalk. during which periods of time has the student stopped? a 7 s - 10 s b 0 s - 3 s and 7 s - 8 s c 0 s, 7 s, and 10 s only d 3 s - 5 s and 8 s - 9 s

Explanation:

Step1: Understand motion - position graph

On a position - time graph, when the student stops, the position does not change with time, so the graph is a horizontal line.

Step2: Identify horizontal line segments

In the given graph, the horizontal line segments are from \(t = 3\ s\) to \(t=5\ s\) and from \(t = 8\ s\) to \(t = 9\ s\). During these time - intervals, the position of the student remains constant, which means the student has stopped.

Answer:

D. 3 s - 5 s and 8 s - 9 s