Question

What is the velocity at 10 s?

Answer 1

Explanation:

$\text{Velocity is defined by the average displacement per unit time. In the time interval }t=8\text{s to }t=12\text{s,}$

$\text{the velocity, or equivalently the slope of the graph is }\frac{(-4)-(-4)}{12-8}=0$

$\text{Therefore, the velocity at }t=10\text{s is }0$

Answer 2

Answer:

0 m/s

Explanation:

The object from 8s to 12s stays at -4m, meaning that it doesn't move in that interval and therefore has zero velocity. Hope this helps!