A typical walking speed is two meters per second. Probably the fastest speed for running (by people) is about ten meters per second -- 100 meters in 10 seconds.
An American Football field is 91.44 meters long, from goal line to goal line. At two meters per second, you can walk that far in 45 or 46 seconds.
Timing yourself with a watch with a second hand, how long does it take you to walk 91.44 meters?
(Mathematical experiment.)
The distance between bases on a baseball field is 27.432 meters. You can time a batter from home plate to first base to estimate the batter's speed. Somebody stealing second base might not start from first base, but if a player "tags up" you can time between other bases.
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