If you have a 100-yard dash time, divide it into 205 to get an approximate miles per hour speed.
So, if you have a 10 second 100-yard dash, you are going about 20.5 mph. If you have a 14 second 100-yard dash, you are going about 14.6 mph. If you have a 12 second 100-yard dash, you are going about 17 mph. An 8 second time? About 26 mph.
If you have a 40-yard dash time, divide it into 80 to get an approximate miles per hour speed.
So, if you have a 5 second 40-yard dash, you are going about 16 mph. If you have an 8 second 40-yard dash, you are going about 10 mph.
what do you mean “divide it into”? Divided by?
It means to divide 205 by your time. So, of course, a 10-second time would be 205/10 = 20.5 mph.
Make sense now? Any other questions I could answer?
I hope all is well with you.
This method overlooks the time needed to accelerate. It would be legit if both sprints were from a running start, but the 40-yd sprinter has a disadvantage here since a greater portion of his sprint is spent accelerating to his top speed.
Thank you for the response and for bringing up that point!
But “overlook” has (at least) two meanings here:
1. to neglect for purposes of simplifying an analysis, while maintaining the various contexts involved;
2. to not remember to consider or to not know to consider.
I did the first.
I am aware of acceleration. I am also aware of other factors that affect speed: ground conditions, nature of surface running on, terrain, elevation change, wind speed, sleep status, health status, nutrient status, mitochondrial function, age, recent workouts, etc.
While it would be fascinating to bring all those factors into play to get a multi-variate function for speed, it is no way to start, and not something to carry around for common use.
Yes, as Brian says, in some but not all contexts we should consider acceleration. Thanks!
thank you for that sir
Given that time of acceleration varies due to variation in quick twitch vs slow twitch muscle makeup as well as reflex reaction time and that a 4.5 40 equates in the real world to a 100 yard dash time between 9.4 to 9.8 seconds its impossible to predict what someone’s top speed will be just based on averaging speed as a constant. A person running 10.5 in the 100 yard dash could hit 20.5 mph at top speed.
Well, as I think about it, and with my philosophic outlook, it’s not impossible to predict. Humans can and do do so. It’s a fact.
What we cannot do is dictate reality. There is no necessary connection between “I think” and “It is.” A connection has to be logically established.
Conversely, it’s also wrong to say, as bad philosophers out there do, that we cannot know reality.
So, yeah, we can totally gather data from, e.g., 40-yard dash times correlated with someone’s 100-yard dash times (maybe having some science involved in the correlation), and then say to someone that, based on their 40-yard dash time, we predict a specific 100-yard dash time, in the broader philosophic context of a certain relationship between consciousness and reality (consciousness as identification and reality as identity).