32 mph (51.488 kph)
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Usain Bolt's fastest recorded speed is about 12.27 meters per second, achieved during his world record-setting 100m sprint in 2009.
9.8 meters per second each second = 9.8 m/s2.
11 meters per second is equivalent to about 24.6 miles per hour.
1.5 meters per second is equivalent to approximately 3.37 miles per hour.
One knot is equal to 0.514 meters per second.
1 knot is equal to approximately 0.514 meters per second.