Why are athletes not the same starting line position 5

The 100 meters are the same running line.

200, 400 and above are different starting lines, because the last one is the innermost lap and the first is the outermost lap, while the inner lap is shorter and the outer lap is longer. Therefore, they do not run the line together.

Each athlete runs an elliptical track with a different radius at the beginning.

Some have a large radius and some have a small radius, and if you start in a uniform position, the runners with a large radius will have to run a little more distance, so at the beginning of the starting line, the first to start is the outer runners.

After running a lap, you can finish the track, so you don't have to run on the original track.

For the sake of fairness, long-distance running competitions often subtract the extra distance traveled by the outer circle runners before the start of the race. So the starting line position of the athletes is not the same.

The starting point of the sprint is the same, only the starting line of the middle and long distance run is diagonal, because the outer track of the track is longer than the inner track, so in order to make the length of the run consistent, the starting line is oblique.

Because the length of each lap is different, you think, each runway has two arcs (that is, the place where the semicircle turns), each runway also has a width, and the outermost runway is the longest, for the sake of fairness, so the difference will be divided at the starting point.

The track is mostly circular, and athletes run around the track, because the distance (circumference of the circle) is the same, and each athlete is different from the center (radius) of the track, so the outermost one is further than the innermost starting line!

The runway is not a straight line, and if you want to run together, the inner circle will be short, and the outer circle will be... So the order of the outer ring is advanced a little distance, hehe,

The runway is circular, and of course the perimeter is longer.

The explanation on the first floor is more accurate. Because the length of the run is different.

The circumference of the first lane of the standard semicircular track and field field is 400m, and its radius has different design schemes, commonly used 36m, etc.

1) Calculation of the runway perimeter (1st lane perimeter).

1. Calculation of curve length.

The sum of the lengths of the two curves in a semicircular track field is exactly equal to the circumference of a circle. According to the circumferential formula c=2 r, then the length of the two curves of the first lane (calculated line length) is:

2 A curve is long.

2. Calculation of the length of the straight section.

Two straight lengths = full length of the runway - two curves length.

A straight segment is long.

3. Calculation of the total length of the runway.

The total length of the runway = two curves + two straight sections.

400m III).

Calculation of the length of each lane switch (using the width of the lane in meters as an example).

According to the circumferential formula c = 2 r

cn=2π[r+（n-1）d+

C represents the circumference of the curve, N represents the number of passes, R represents the radius of the field, and D represents the width of the lane).

3) Calculation before the starting line is extended.

If both runners run their own lane for 1 week, the runner in lane 2 will run more than the runner in lane 1. In order for the 2nd lane to be equal to the distance traveled by the runner running the 1st lane, the starting point must be extended some distance forward. The distance that should be stretched forward is called the number of starting line extensions.

The method of calculating the forward extension of the starting line is the length of the curve of a certain lane minus the length of the curve of the first lane, which is the number of starting line extensions of the lane. The formula is as follows:

wn=2π[r+（n-1）+

Length of each lane of conventional runway:

Runway. Length (m).

In order to fairly subtract the extra distance that the runners run at the start, the athletes have different starting positions, and the closer they get to the outside, the farther they start, the farther they start.

Because the inner radius of the circle is smaller than the circumference of the outer radius of the circle. We're happy to answer for you!

For example, the men's and women's 100-meter runs, men's 110-meter hurdles, and women's 100-meter races are all held on the straight, and the start is also on the same straight line. Races above 1500 meters, because the start can grab the track, the start is basically the same straight line, of course, because there are more people participating in the race, in order to let more people start at the same time, the starting line of these races is a diagonal line.

So what kind of race doesn't start in the same straight line? Men's and women's 200m, 400m, 800m, 400m hurdles, 4*100 relay, 4*400m relay, these races start before and after.

The standard 400-meter track is made up of two sections, two straights on either side (the red part in the picture) and two semi-circular curves at each end (the blue part at each end).

The 400 distance of the standard runway means that the length of the innermost runway is 400 meters, and the length of this runway is equal to the length of the red part of the diagram L1 and the length of the blue part L2As you can see from the figure above, the length of the red part is fixed at 87 meters on both sides, and the length of the blue part varies with the number of runs, and the closer to the inside of the runway, the shorter the arc is and the longer the outward arc. So how do you calculate the length of this arc?

Since the curves on both sides of the runway are each a semicircle, which together form a full circle, then the length of the blue part (curve) can be calculated using the circumference of the circle

l2=πd=π【d'+(n-1)d"]=

d'Refers to the radius of the arc of the runway, and the radius of the arc of a standard 400-meter runway is 36 meters.

d"Refers to the width of each lane, and the width of the passes of a standard 400-meter runway is meters.

n is the number of runways is 1--9, most runways are 1--8, and there are only 9 runways for each runway.

By substituting the above values into the formula, the length of each pass can be calculated. Through calculations, it can be known that from the inside to the outside, the length of the curve.

The first 87 2+2 400

Second, 87 2+2 408

Third, 87 2+2 415

Fourth, 87 2+2 423 m.

Fifth: 87 2+2 430 m.

Sixth 87 2+2 438 m.

Seventh 87 2+2 445 m.

Eighth 87 2+2 453 m.

PS: The above calculations are all only taken as integer parts.

As can be seen from the above calculations, the running distance from the inside to the outside of the track is gradually getting longer, which is unfair to the people who run the outside track, and in order to solve this problem, the only way to solve this problem is to let the people on the outside track start a little closer to the finish line according to the number of corners.

For example, if the meter only passes the curve once, then take one as the benchmark and extend it forward by 4 meters in turn. Among them, 200 meters is the only corner in the whole race, and 800 meters is the first time you can grab the road after crossing the corner.

400 meters, 4 * 100 meters, 4 * 400 meters because of two curves, in turn to extend the meters upward.

If you run the same line and run one lap. Isn't it even more disadvantageous in the outer circle.! Different locations. It's because it's the same distance.