Due to the curved/circular path of the track, the diameter is longer with each lane that moves outwards. Runners start at intervals for the 400 meter dash so that all runners end up running 400 meters in the end and not more or less.
A staggered start.
Virtually all athletics tracks are 400 metres long. This is why they have a staggered start in 400m races. An 800 metres race is therefore 2 laps of a 400m track.
It starts at 10:10 AM with a staggered start to avoid congestion. In other words the race is run against a computer clock instead of 'gun' time with the elite women jumping off to begin the race and three staggered groups following their lead. Each runner wears a computer chip in their shoe to track them through the course.
No. The staggered start is used to allow a large field (some with in excess of 100 teams) to "spread out" at the line and avoid a "bunching up" of contestants in a race.
In athletics it's called a staggered start, when athletes do not all start from the same start line. They must run a certain part of the race in their own lane before they are allowed to gravitate towards the innermost lane.
A hundred-meter race
You don't.
The track length is longer for the outer lanes. The starting blocks are staggered so that each runner has an equal distance to the finish line. They have to remain in their respective lanes because of the position where they started, to make it fair to all runners.
The 100 meter race started in the 1896 Olympics.
The Distance they run is the same by the end of the race.
You normally start a 400m race (outdoor track) at the same place as 800, 1600 and possibly 300; which isn't a common event in outdoor track and field anyway
The 220 yard race has been replaced with the 200 meter race although it is about 222 yards long; the 440 yard race has been replaced with the 400 meter race; and the 1,500 meter race has replaced the mile.