Question

A graph titled Position versus time for with horizontal axis time (seconds) and vertical axis position (meters). The line runs in 3 straight segments from 0 seconds 0 meters to 4 seconds 12 meters to 6 seconds 12 meters to 12 seconds 0 meters.

Use the graph to determine the instantaneous speed at 2 seconds.


_______m/s

What is the average speed over the entire trip?


_______ m/s

Answer 1

3/ms and 2/ms

Explanation:

Answer 2

• 3 m/s; 2 m/s

Explanation:

Use the formula:

• Speed = distance / time

According to the graph, the distance at 2 seconds is 6 m.

The speed is:

• s = 6/2 = 3 m/s

Total distance is 12 m between zero and 4 seconds and 12 m between 6 and 12 seconds, there is no movement between 4 and 6 seconds. and total time is 12 seconds.

The average speed is:

• s = (12 + 12) / 12 = 24 / 12 = 2 m/s