Final answer:
Usain Bolt's average speed during his 100m world record run in Berlin was approximately 10.4 meters per second (m/s) or 23.4 miles per hour (mph), calculated by dividing the distance (100m) by the time (9.58s).
Step-by-step explanation:
To calculate the average speed of Usain Bolt during his world record 100m dash, we need to divide the total distance run by the total time taken to cover that distance. The formula for average speed (v) is v = d/t, where 'd' is distance and 't' is time.
Given the distance (d) is 100 meters, and the time (t) is 9.58 seconds, Usain Bolt's average speed can be calculated as follows:
Distance (d): 100 m
Time (t): 9.58 s
Average speed (v): v = d/t
= 100 m / 9.58 s
= 10.4 meters per second
When you perform the calculation, you find that his average speed is approximately 10.4 meters per second (m/s), which is also equivalent to about 23.4 miles per hour (mph).
This average speed signifies that although Usain Bolt did not maintain this speed throughout the entire race (he had to accelerate from a standstill), his peak speed was higher to achieve such an average.
Hence, the average speed is 10.4 meters per second.