Physics

In a position-time graph, the slope of the line represents the velocity of the object. The greater the magnitude of the slope, the greater the speed of the object.

Calculate the slope (and thus the speed) for each time interval:

0 - 10s:

The initial position at is and the final position at is . Then the slope . The speed .

10 - 15s:

The position of the object remains constant at x=60m during this time interval. So, the speed .

15 - 40s:

The initial position at is and the final position at . Then the slope

Click "Show Answer" to reveal the answer and analysis