Here's some quick math...
Might be wrong:
9.69 seconds is the record in a 100M race
328.08 feet = 100 M
33.86ft/sec for 100M
converted to mph...
23.08mph average speed.
The average speed of a sailboat depends on the wind to a large extent, also ho it is rigged. So the average can vary a great deal, depending on the circumstances
It is in Ancient Greece that the Olympic Games began. They were mainly foot races done by young men who ran nude. The winner got a laurel leaf crown.
wing
By foot, then car, then foot again into the stadium.
The average speed for both men (together) is 6.66... (repeating) km per hour.
Geramany
25,00000 square foot
Foot sprint race.
Eight-Foot High Speed Tunnel was created in 1936.
About 200 metres.
Distance divided by the time it takes to cover the distance, equals average speed per unit of time. For example: An object takes 0.5 seconds to cover 1 foot. 1 divided by 0.5 equals 2 (1/0.5=2) so it is traveling at an average speed of 2 feet per second.
There are more foot injuries in olympic athletes who go barefoot, and they have more problems with traction.