- #1
Nigel1500
- 1
- 0
Hi,
I'm trying to find out the time it takes to travel a known distance, but with a capped speed.
For example, let's say a train has an acceleration rate of 0.8m/s/s, and a top speed of 72km/h, ie: 20m/s. It's going to make a 12km journey, accelerating to it's top speed from rest. How long does it take?
I have the formula: d=vt + 1/2at2
where v = initial velocity, in this case 0. d = distance, a = acceleration.
I'm having trouble making "t" the subject. Because the train is starting from rest, with an initial velocity of 0, I'm ignoring that part of the equation entirely. I came up with this:
t = (√2d)/a
Is that correct?
Thanks in advance.
Nige'
I'm trying to find out the time it takes to travel a known distance, but with a capped speed.
For example, let's say a train has an acceleration rate of 0.8m/s/s, and a top speed of 72km/h, ie: 20m/s. It's going to make a 12km journey, accelerating to it's top speed from rest. How long does it take?
I have the formula: d=vt + 1/2at2
where v = initial velocity, in this case 0. d = distance, a = acceleration.
I'm having trouble making "t" the subject. Because the train is starting from rest, with an initial velocity of 0, I'm ignoring that part of the equation entirely. I came up with this:
t = (√2d)/a
Is that correct?
Thanks in advance.
Nige'