Oct 9, 2003 1:12 PM
|can someone give the math equation for calculating speed. for instance if i did a 23.4 km tt in 47min 23 secs? what was the average speed?|
|re: calculating speed||Xeo|
Oct 9, 2003 2:25 PM
|To calculate km/hour given length and time, you use basic dimensional analysis.
Here is how you set up the problem
Number (km) / number (min) * 60 min / 1 hour = speed/hour
Basically you start off in km per minute and you want km/hour, so you use a conversion factor.
This is what your speed was.
23.4 km / 47 min * 60 min / 1 hour = 29.87 km/hr
If you want miles per hour just divide 29.87/1.6 = 18.66
I rounded the minutes but it is basically accurate.
|thanks much appreciated...nm||iatola-rocnrola|
Oct 9, 2003 2:31 PM
|(hint - any value divided by 1 is equal to itself). nm.||Steve_0|
Oct 10, 2003 7:37 AM
|re: calculating speed||collinsc|
Oct 9, 2003 2:26 PM
23/60 = .383 minutes
+ 47 minutes = 47.383 minutes / 60 = .7897 hrs
23.4 km / .7897hrs = 29.63 km/hr = 18.41 mph
|More info than you'll ever need...||coonass|
Oct 9, 2003 3:45 PM
|online calculator here||Time Trial dot org|
Oct 9, 2003 4:06 PM
|"per" means "divided by" - kilometers "divided by" hour(s) nm||BowWow|
Oct 9, 2003 9:59 PM
|I think you need more than an equation||niteschaos|
Oct 10, 2003 5:03 AM
|Perhaps a trip back to elementary math? Yeah, you'd get alot out of it. Just don't forget your units. mph = miles per hour = miles/hr = Distance/time. I bet your checkbook looks like a mess.|
|That was uncalled for (nm)||OffTheBack|
Oct 10, 2003 6:04 AM
Oct 10, 2003 5:42 AM
|did no-one pay attention in 3rd grade math?
Does no-one understand the significance of the term Miles per hour?
No offence to rocnrola specifically, I just cant fathom how often this question is asked.
Oct 10, 2003 1:30 PM
|This is the formula I use in my spreadsheet:
or in plain english:
Miles divided by the sum of these three:
2) Minutes divided by 60
3) Seconds divided by 3600