# How to transform acceleration from m/s2 to km/h2 and reversed?

1. Oct 9, 2011

### An00b

1. The problem statement, all variables and given/known data

0,27m/s2=? km/h2

2. Relevant equations

1m = 1/1000 km
1s = 1/3600 hours

3. The attempt at a solution

I have no idea.

2. Oct 9, 2011

### SteamKing

Staff Emeritus
Not even a guess?

3. Oct 10, 2011

### An00b

I would really need an answer within 20 minutes :D

I guess if you have for ex. 5 m/s2 in km/h2 you would do

5*(1/1000)/(1/3600)2

if that is correct, how to finish? Do you really have to square 3600 or is there an easier way?

4. Oct 10, 2011

### WJSwanson

Yep. You have to square 3600. It's pretty easy if you break it up into parts. (a+b)^2 = a^2 + 2ab + b^2

(3000 + 600)^2 = 3000^2 + 2(3000)(600) + 600^2 = 9000000 + 3600000 + 360000 = 12960000

Alternatively, (ab)^2 = a^2 * b^2 = 36^2 * 100^2 = 1296 * 10000 = 12960000

5. Oct 10, 2011

### sankalpmittal

More easier method to convert km/hr2 ----> m/s2 is to multiply the value in km/hr2 by 1/12960 .

To do reverse multiply the value in m/s2 by 12960.

So in your case ,
5 m/s2 = 5*12960
= 64800 km/hr2