Urgent need for data on each starting line of the 200M track and field field.

A semicircular 200 m track field has a radius of 15 or 21 m, and a radius of 15 m is described here (Figure 2-1). 1) Main parameters (1) area This semi-circular 200 m track and field field has a field area of 94m 42m, with 4 runways, each track is wide, and there is a margin of 1m around the field. (2) Straight length = 94-2 (15+ (m) (3) Straight adjusted length = ( m) (4) Total curve length = 2 (m) (5) Perimeter =2 (m).

2) How to draw the start and finish points of each event of the track race (Figure 1) (1) The finish line The finish line is set at the first cut-off line. (2) 100m start The straight of this track and field is less than 100m long, which should be solved by extending one or both ends of the straight (Fig. 2), otherwise the start of the curve will be adopted. If you start with a curve, the starting point is in front of the third dividing line; The number of extensions for each lane is the number of extensions for a curve.

3) 200m start Because 200m runs exactly one lap, its starting point extends forward at the first dividing line; The number of runges in each lane is exactly the same as that of a standard track and field 400m track. (4) 400m starting point In the 200m track and field field, 400m has to run two laps, so the method of running two corners in separate lanes, and then cutting inward through the lane grabbing mark line, and then running without lane splitting. Its starting point is equal to the number of runges of a 200m run plus the cut difference, so draw a lane grab mark line at the fourth dividing line according to the difference of each lane except the second lane.

5) 800m, 3000m, 5000m starting point The three running events do not diverge from each other. They start in an arc and are drawn in the same way as the starting line of a standard track and field run.

The drawing method is the same, but the number of laps is different. (6) The 1500m starting point and the 1500m run are also non-lane starts. The starting line is in an arc and is drawn in front of the third dividing line.

7) 4 The starting point of the 100m relay run and the starting point of the relay area The starting point is the same as the starting point of the 400m run, and the whole course runs two laps. The first relay area is the lane separation relay area, and at the third dividing line, their distance and the radial length of the curve are shown in Figure 2-2. The second relay area is 10m before and after the first demarcation line.

After the second runner takes over the baton, he can run through the lane marking line at the fourth dividing line to cut into the lane and run no longer in the lane, so the first relay area is a public relay area. The third relay area, located 10m before and after the third dividing line, is also a public relay area.

It is necessary to observe the field to know the difference in cut.

Summary. Hello! The total length is added according to the circumference formula of the circle, and the 400m is required to run for 2 weeks on a track with a circumference of 200 meters, and the rules stipulate that a lane run is divided for a course of less than 800 meters.

Hello! According to the formula of the circumference of the circle, the total length is added, and the 400m of the trouser is changed to the runway with a circumference of 200 meters for 2 weeks, and the rules stipulate that the runner below 800 meters is a lane split.

The first road is 200 meters a week, the second road is 200 + 400 meters a week, the number of forward extensions is meters, and the third road is 200 + 400 meters a week.

The sports field of the 400 track is a quasi-sports field with a marking, 200 meters marking, generally 100 meters of curves, 100 meters of straights.

According to the measurement of 200 meters from the first runway to the end of the inner line, the hidden infiltration is set in turn.

Summary. How to calculate the number of protrusions:

1) Calculation method of the number of starting point extensions:

a.Subtraction (difference method): ln=cn-c1

b.Induction Formula:

ln=mπ[(n-1)

ln=mπ[(n-1)

Note: LN represents the number of forward extensions at the starting point of the nth road, and M represents the number of curves (number of curved sections).

n represents the pass number and d represents the width of the lane.

N represents the cut difference, and C1 represents the first curve to calculate the line length.

cn stands for n curves and calculates the line length.

ln=cn-c1

2π[r+(n-1)d+

2π[(n-1)

For example, the number of 400m starting point extension.

l2=2×l8=2×

L400m starting point extension = 2 [(n-1)

How to determine the number of starting line stretches for the 400-meter run in the 200-meter track and field.

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This is a small calculation.

How to draw the 200-meter track and the number of forward extensions - people usually put the number of 200m and above (including hurdles. Relay Race) and Split Lane Running, in order to make the distance run by the runners in each lane equal. It is necessary to place the outer road (2-8) at each point (starting point.

Column sites. The position of each point in the relay area is moved forward within the lane, and the distance of this forward movement is collectively referred to as the number of extensions.

Cause: Calculation of line length from curves. It can be seen. The larger the radius of the outer Dao Danming cherry blossom mold bush curve, the larger the calculation line, so we say that the number of forward extension is due to the increase of the radius of the curve and produces the Huai circle.

Calculation method of the number of extensions: (1) Calculation methods of the number of starting points: a

Subtraction (Difference Method): ln=cn-c1bInduction Formula:

ln=m [(n-1)Note: ln represents the number of forward extensions at the beginning of the nth road, m represents the number of bends (the number of curved sections), n represents the number of passes, d represents the width of the lane, n represents the cut difference, c1 represents the length of the calculation line of the first curve, cn represents the length of the calculation line of the n-way bend, and the calculation line length ln=cn-c1=2 [r+(n-1)d+Example: 400m, the starting point of the forward extension, the number of wild eyes.

l2=2 Number of starting point extensions=2 [(n-1)

Set the time to t if before B and after A.

200t-160t=180

40t=180

t = minutes. If A is before, B is after.

200t-160t=400-180

40t=220

t = minutes.

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Just add the difference in each number.

The 400-meter standard runway has a radius of 36 meters and a runway width of one meter.

The circumference of the first lap of the track is 2*m.

The circumference of the second lap track is 2*m.

The circumference of the track on the second lap is subtracted from the circumference of the track on the first lap.

Mi Mi Qi Gao = m.

200 meters and half a circle of meters 2=meters.

The 400-meter standard runway has a radius of 36 meters and a runway width of one meter.

The circumference of the first lap is 2*.

The circumference of the runway on the second lap of the runway is 2*.

meters wide of the runway, the circumference of the runway in the second lap.

The circumference of the track on the second lap minus the circumference of the track on the first lap.

Meters = meters. Meters = meters.

The width of the runway is meters, and if the adjacent runway periphery runs the amusing road, it needs to be advanced by meters.

The width of the runway is meters, and the runway on the periphery of the adjacent runway needs to be advanced by meters.

If you can, please give a good review