The speed after 100 seconds is: speed =1000m/s + 4m/s^2x100s= 1000m/s + 400m/s=1400 m/s.
the total distance you run is 400m. so it is the same thing. all 4x100 means is that there are 4 people running 100 meters.
On a standard outdoor athletics track of 400m: 1200m / 400m = 3 laps. Indoor athletics tracks can be 200m in which case 1200m / 200m = 6 laps.
Hah, no. Fastest 400M is 43.18 seconds
Michael Johnson 43.18 seconds.
It's somewhere around 44 to 48 seconds
Its 43.18 seconds held by Michael Johnson
43.18 by Michael Johnson
12.5 m/s (m per seconds)
he completes it in 69.9 seconds
60sec in a min/20=3*400m = 1200m/min*60(min per hr)= 72000m/h= 72km/h