The problem involves calculating Usain Bolt's average speed during his world record 100-meter sprint.
The duration of the sprint was 9.58 seconds.
This calculation involves understanding the relationship between distance, rate (speed), and time.
Basic Formula
Distance = Rate x Time
To find rate (speed), rearrange the formula: Rate = Distance / Time
Given Values
Distance: 100 meters (length of the race)
Time: 9.58 seconds (duration of the race)
Calculating Average Speed in Meters per Second
Substitute the given values into the formula:
Rate = 100 meters / 9.58 seconds
Perform the division:
Rate ≈ 10.4 meters per second
Converting Speed into Kilometers per Hour
Convert meters per second to kilometers per second:
10.4 meters is equivalent to 0.0104 kilometers
Divide by 1000
Convert kilometers per second to kilometers per hour:
Multiply by 3600 (seconds in an hour)
0.0104 km/s x 3600 = 37.4 km/h
Converting Speed into Miles per Hour
Use the conversion factor: 1 mile = 1.61 kilometers
Convert kilometers per hour to miles per hour:
37.4 km/h ÷ 1.61 = 23.3 miles per hour
Summary
Usain Bolt's average speed during the race:
10.4 meters per second
37.4 kilometers per hour
23.3 miles per hour
Comparison
Usain Bolt's speed (23.3 mph) is fast for a human but slower than some animals (e.g., charging elephant at 25 mph).
Conclusion
Understanding these conversions helps in contextualizing Usain Bolt's speed in different measurement systems for better comprehension across different regional systems.