Velocity-Time Graphs (GCSE Physics)
Velocity-Time Graphs
Velocity-Time Graphs
Drawing Velocity-Time Graphs
Just like a distance-time graph, a velocity-time graph can also represent motion. You can see how the velocity of the object changes with time. For exams, you should be able to draw and interpret these graphs, as shown below.
Question: An athlete at the start of a race. The race is along a straight track. In the first 2 seconds, the athlete accelerates constantly and reaches a speed of 9 m/s.
Complete the graph to show how the velocity of the athlete changes during the first 2 seconds of the race.
1. Pick out information.
Since this question is rather long-winded, we need to pick out the useful information.
Starting velocity = 0 m/s
Final velocity = 9 m/s
Time taken = 2 seconds
2. Draw onto the graph.
Using the information we have just found, we can now modify the diagram. We know that the time taken is 2 seconds, and that the velocity reached is 9 m/s.
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