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  1. How to read a position vs. time graph. Using the graph to determine displacement, distance, average velocity, average speed, instantaneous velocity, and instantaneous speed. Created by David SantoPietro.

  2. We're going to look at position versus time graphs, and use them in order to figure out displacement and distance traveled. So this first question says, a 3.2 kilogram iguana runs back and forth along the ground. The following graph shows the horizontal position of the iguana in meters over time.

  3. How to Find Distance in Speed-Time Graph. The diagram below shows a speed-time graph of a car. A straight line indicates a constant speed for a length of time. In order to calculate distance traveled, you’ll need to consider the horizontal axis and vertical axis as length and breadth.

  4. How does a distance-time graph work? Distance-time graphs show distance from a fixed point at different times. Distance is on the vertical axis, and time is on the horizontal axis. The gradient of the graph is the speed. A positive gradient represents the object (or person) moving away from the starting point.

  5. Calculating the speed from a distance-time graph. To find the speed of an object from a distance-time graph, we need to calculate the gradient (or slope) of the line. First choose two points that lie the line - say point A is (0 , 0) and point B is (10 , 50).

  6. Use your measurements of time and the displacement to make a position vs. time graph of the ball’s motion. Repeat Steps 4 through 6, with different people taking on the roles of experimenter, timer, and recorder.

  7. In this explainer, we will learn how to determine speeds from distancetime graphs. We recall that, on a distance–time graph, a line through a set of points plotted on the graph represents a speed. The following figure shows a distance–time graph. On the graph, two lines are shown.