anyway to calculate 0-60 from 1/4 mile time ?
#2
#7
My husband who is a mathamatics researcher says it is possible another way. The only 2 basic formulas are:
v= u +at
v^2 = u^2 + 2as
where v is final velocity (speed), u is initial velocity(which is 0 since you start from rest), a is acceleration(assumed constant if you keep your foot on the pedal and don't move it!)), s is distance and t is time.
your initial velocity is 0 (because you start from rest), your distance is anything you choose (say 1/4 miles) Acceleration you don't know (you want to know but there is no acceleration gauges in the car).
so the formula reduces to
v^2 = 2as (since initial velocity is zero)
So the next time you drive (assuming acceleration is constant), note the final velocity when you reach 1/4 miles and then the formula becomes
a = 2 v^2
so now you know the acceleration
Now use the formula
v = u + at
since you start from rest u is 0
and you have already figured out the acceleration, you want to know what time it takes to get to 60 mph, which is the final velocity
so you have the formula reduced to
60 = 2 v^2 t
so
t= 30 / v^2
So, next time you drive carefully note your speed when you have reached 1/4 mile. and simply divide 30 by the square of that number. That is the time (in hours). Then you multiply by 60 to get time in minutes, multiply by 60 again to get time in seconds etc.
What happened to the old fashioned way of using a stopwatch?
v= u +at
v^2 = u^2 + 2as
where v is final velocity (speed), u is initial velocity(which is 0 since you start from rest), a is acceleration(assumed constant if you keep your foot on the pedal and don't move it!)), s is distance and t is time.
your initial velocity is 0 (because you start from rest), your distance is anything you choose (say 1/4 miles) Acceleration you don't know (you want to know but there is no acceleration gauges in the car).
so the formula reduces to
v^2 = 2as (since initial velocity is zero)
So the next time you drive (assuming acceleration is constant), note the final velocity when you reach 1/4 miles and then the formula becomes
a = 2 v^2
so now you know the acceleration
Now use the formula
v = u + at
since you start from rest u is 0
and you have already figured out the acceleration, you want to know what time it takes to get to 60 mph, which is the final velocity
so you have the formula reduced to
60 = 2 v^2 t
so
t= 30 / v^2
So, next time you drive carefully note your speed when you have reached 1/4 mile. and simply divide 30 by the square of that number. That is the time (in hours). Then you multiply by 60 to get time in minutes, multiply by 60 again to get time in seconds etc.
What happened to the old fashioned way of using a stopwatch?
#9
you're supposed to be able to get it from your 60ft time as well.......but i dont think that is ery accurate.
got these off another board, just use as a loose estimate of your 0-60 times. they've been G-tech'd somewhat reliably at a couple dragstrips, so here's the list:
2.3 second 60' time = 35.5 mph @60' = 7.0 second 0-60 time
2.2 second 60' time = 37.1 mph @60' = 6.5 second 0-60 time
2.1 second 60' time = 38.9 mph @60' = 5.9 second 0-60 time
2.0 second 60' time = 40.9 mph @60' = 5.2 second 0-60 time
1.9 second 60' time = 43.0 mph @60' = 4.6 second 0-60 time
1.8 second 60' time = 45.5 mph @60' = 4.0 second 0-60 time
1.7 second 60' time = 48.1 mph @60' = 3.4 second 0-60 time
1.6 second 60' time = 51.1 mph @60' = 2.9 second 0-60 time
1.5 second 60' time = 54.5 mph @60' = 2.2 second 0-60 time
1.4 second 60' time = 58.4 mph @60' = 1.5 second 0-60 time
1.36 second 60' time = 60.0 mph @60' = 1.36 second 0-60 time
1.3 second 60' time = 62.9 mph @60' = 1.2 second 0-60 time
1.2 second 60' time = 68.1 mph @60' = 1.1 second 0-60 time
1.1 second 60' time = 74.3 mph @60' = 0.9 second 0-60 time
1.0 second 60' time = 81.8 mph @60' = 0.7 second 0-60 time
got these off another board, just use as a loose estimate of your 0-60 times. they've been G-tech'd somewhat reliably at a couple dragstrips, so here's the list:
2.3 second 60' time = 35.5 mph @60' = 7.0 second 0-60 time
2.2 second 60' time = 37.1 mph @60' = 6.5 second 0-60 time
2.1 second 60' time = 38.9 mph @60' = 5.9 second 0-60 time
2.0 second 60' time = 40.9 mph @60' = 5.2 second 0-60 time
1.9 second 60' time = 43.0 mph @60' = 4.6 second 0-60 time
1.8 second 60' time = 45.5 mph @60' = 4.0 second 0-60 time
1.7 second 60' time = 48.1 mph @60' = 3.4 second 0-60 time
1.6 second 60' time = 51.1 mph @60' = 2.9 second 0-60 time
1.5 second 60' time = 54.5 mph @60' = 2.2 second 0-60 time
1.4 second 60' time = 58.4 mph @60' = 1.5 second 0-60 time
1.36 second 60' time = 60.0 mph @60' = 1.36 second 0-60 time
1.3 second 60' time = 62.9 mph @60' = 1.2 second 0-60 time
1.2 second 60' time = 68.1 mph @60' = 1.1 second 0-60 time
1.1 second 60' time = 74.3 mph @60' = 0.9 second 0-60 time
1.0 second 60' time = 81.8 mph @60' = 0.7 second 0-60 time