translation of km/h to mph (a simple question)
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From: London, UK
CLS 63 AMG (previously) looking for another AMG
translation of km/h to mph (a simple question)
I feel I know the answer to this question but need confirmation.
What does a 0-100 km/h (or 0 - 62mph) time of 4.5 translate to in 0-60 MPH? Do you simply minus .2 of a second thus 0-60 = 4.3?
What does a 0-100 km/h (or 0 - 62mph) time of 4.5 translate to in 0-60 MPH? Do you simply minus .2 of a second thus 0-60 = 4.3?
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Joined: May 2005
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2005 C230K
College Student who's in Physics to the rescue!!!!
We have the equation Vfinal = Vinitial +at
so..... 27.77 m/s = 0 + a(4.5s)
a = 6.17 m/s2
and so for 60 mph = 96kmh = 26.667 m/s
t for 0-60 = 26.667/6.17 = 4.32 seconds
So even though for this instance you could kind of subtract .2 that will definately not work in most other situations. It was kind of just a lucky coincidence. Hope this helps.
We have the equation Vfinal = Vinitial +at
so..... 27.77 m/s = 0 + a(4.5s)
a = 6.17 m/s2
and so for 60 mph = 96kmh = 26.667 m/s
t for 0-60 = 26.667/6.17 = 4.32 seconds
So even though for this instance you could kind of subtract .2 that will definately not work in most other situations. It was kind of just a lucky coincidence. Hope this helps.
Thread Starter
Member
Joined: Aug 2006
Posts: 89
Likes: 0
From: London, UK
CLS 63 AMG (previously) looking for another AMG
College Student who's in Physics to the rescue!!!!
We have the equation Vfinal = Vinitial +at
so..... 27.77 m/s = 0 + a(4.5s)
a = 6.17 m/s2
and so for 60 mph = 96kmh = 26.667 m/s
t for 0-60 = 26.667/6.17 = 4.32 seconds
So even though for this instance you could kind of subtract .2 that will definately not work in most other situations. It was kind of just a lucky coincidence. Hope this helps.
We have the equation Vfinal = Vinitial +at
so..... 27.77 m/s = 0 + a(4.5s)
a = 6.17 m/s2
and so for 60 mph = 96kmh = 26.667 m/s
t for 0-60 = 26.667/6.17 = 4.32 seconds
So even though for this instance you could kind of subtract .2 that will definately not work in most other situations. It was kind of just a lucky coincidence. Hope this helps.
Many thanks for this! This is really helpful since as you know MB and indeed all German car makes quote acceleration times in km/h and not mph as we are more used to in the UK.
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2005 C230K
Oh ya. BTW the equation I used is for constant acceleration, and even though cars don't exhibit constant acceleration it should be close enough in this instance. You couldn't take it and say how long would it take my cls to get to 400 mph? Oh only xx seconds. Clearly it doesn't work that way. But for this example good enough.
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