Question

In 2009, Usain Bolt set the record for sprinting 100 m in approximately 9 3/5 seconds. What is his average speed in meters per second?

a) 10.5 mps
b) 10.3 mps
c) 10.0 mps
d) 9.6 mps

Answer 1

Usain Bolt's average speed during his 100-meter world record run in 2009 was 10.4 meters per second.

Step-by-step explanation:

Usain Bolt set the record for sprinting 100 meters in 9.58 seconds in 2009. The calculation of his average speed is done by dividing the distance by the time taken to cover that distance. Therefore, the average speed is:

100 meters / 9.58 seconds = 10.437157 m/s

When rounded to one decimal place, Usain Bolt's average speed is 10.4 m/s, which corresponds to the provided information stating that his average running rate over the course of this race was 10.4 m/s or 23.4 mph.