Use the formula: Speed = distance / time. If you divide meters / seconds, the speed will obviously be in meters/second.
i believe 800 meters. a good time for a 12 year old girl would be 2:50. A good time for 400 meters would be 80 seconds. If u want to win thoses are good times
that's great a 14 year old should be running it under 12.50 seconds but that's crzy good, i run it in 12.37 seconds
the average time should be around 13-15 seconds. the good athlete will run in the 12 range. if you are running under 12 you are fast
A 9.6 second time in the 100 yard dash is the same as running the 100 meters in 10.5 seconds.
Yes, that is very good for a 12 year old while a man in the Olympics can run about 9 seconds for 100 meters.
20 or more seconds is a good time
11.8 - 12.4 seconds
I don't think there's a real conversion time for this, given that there's 10.4 meters between the two. but if you're running it in 9.6 seconds, you're most likely running a 10 second 100m. Hope this helps.
The converted time for 400 meters is 42.35 seconds.