1. Acceleration Graphing
Science 10

2. Bolt’s World Records

3. Bolt’s World Records Beijing 2008 This gives a top speed of 12.2m/s
Fastest 10m was between 50m and 80m
The time for each of these intervals was:
50-60m - .82s
60-70m - .82s
70-80m - .82s
This gives a top speed of 12.2m/s
Berlin 2009
Fastest 10m was between 60m and 70m
The time for this interval was .81s
This gives a top speed of 12.3m/s

4. Comparison to Average Speed
Determine the average speed for each race (total distance over total time)
This gives 10.3m/s for Beijing
This gives 10.4m/s for Berlin

5. Displacement
The displacement is defined as the distance from your start point to your end point
For example, looking at the table for Michael Phelps, the first leg of the race would have a displacement of +50.m while the second leg would have a displacement of -50.m

6. Calculating Displacement
To calculate displacement, you will subtract the finishing position from the starting position
First leg
Start 0m
Finish 50m
Displacement = 50m – 0m = 50m
Second leg
Start 50m
Finish 0m
Displacement = 0m – 50m = -50m

7. Displacement Signs
The sign in the displacement gives us the direction of motion
Positive would indicate movement to the right
Negative would indicate movement to the left
Calculate the displacement for each remaining leg of Michael Phelps’s race

8. Velocity Velocity is determined by using displacement divided by time
Like displacement, the sign gives the direction of motion
Determine the velocity for each of the legs of the race by dividing the displacement by the time

9. Michael Phelps