Question

Look at the graph below. It shows Angela's journey as she walks to the end of the road and back. Calculate her speed over section 4 of the journey

Answer 1

The speed of Angela over section 4 is approximately 1.33 m/s.

To calculate Angela’s speed over section 4 of the journey, we need to find the change in distance and the change in time over that section.

From the graph, it appears that Angela travels from about 30m to 80m in distance, a change of 50m, and from about 80s to 100s in time, a change of 20s.

Using the formula speed = distance/time

Angela's speed would be:

`$( (40\ m)/(30\ s) = (4)/(3) \ m/s )` or approximately 1.33 m/s.