Answer:
A. 5 m/s
Step-by-step explanation:
From the graph, for the first 2 seconds, the graph is a straight line meaning that the slope is a constant.
Average speed of an object is the rate of change of position. Here, the position of the object changes from 0 m to 10 m for a time interval of 2 seconds.
The change in position (
) and time interval (
) are given as:
![\Delta x=10-0=10\ m\\\Delta t=2-0=2\ s](https://img.qammunity.org/2020/formulas/physics/middle-school/fmabuwh13lv8zwoowmb2u7s16ys1kf9b7v.png)
Therefore, the average speed (
) is given as the ratio of the total change in position and the time interval for the change.
![s_(avg)=(\Delta x)/(\Delta t)=(10-0)/(2-0)=(10)/(2)=5\ m/s](https://img.qammunity.org/2020/formulas/physics/middle-school/z4f91umbp54fhx3acxn9ptohwztzmwhq0b.png)
Hence, the average speed is 5 m/s.