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.

5 m/s2 = 5*12960
= 64800 km/hr2