Question

multiple choice 1 point
distance vs. time graph (runner motion)
a runner runs a race as described by the graph above.
what is the student’s instantaneous speed at 10 seconds? hint: use the graph to get the distance.
formula: ( v = d / t )
0.5 m/s
5.0 m/s
0.2 m/s
500 m/s

Explanation:

Step1: Identify distance at 10s

From the graph, at $t=10$ s, $d=50$ m.

Step2: Apply speed formula

Use $v=\frac{d}{t}$. Substitute values:
$v=\frac{50}{10}$

Answer:

B. 5.0 m/s