It's the first part of the race, when runners dig out of the blocks to maintain as much speed for top-end speed.
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∙ 2011-04-01 13:23:51huh.......
The Baton Changing Zone is 20m
20 meters
The exchange zone on a 400 meter track is 20 meters long. For races involving 200 meter legs or less, a 10 meter acceleration zone may be marked on the track and used by the runner receiving the baton to accelerate to match speed with the incoming runner. With or without an acceleration zone, the baton must still be exchanged within the official 20 meter zone.
The exchange zone is the area where the baton is handed off from one runner to the next.
the space on the track you gain your true speed ------------------------------------------------------------------------------------------------------------- The changeover zone is an area within each lane, 20m long, which begins at the 90m mark from the start of the previous leg and ends 110m from the same point. The baton must be exchanged within this zone. The acceleration zone begins 10m before the change over zone and ends at the start of the changeover zone. The outgoing athlete must start between the start of the acceleration zone and the end of the changeover zone (a length of 30m). The baton is not allowed to be exchanged within the acceleration zone The purpose of the acceleration zone is to allow the outgoing athlete to reach close to top speed as the baton is exchanged. This is good as it is the speed of the baton that is important.
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In a relay race the acceleration zone is 10m long.
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The acceleration is g sin(P).