question with velocity.



hello sir~

maybe, my question look like physics.

if a velocity is t (km/h),
then the acceleration is 1(km/h^2) by differentiation.

since t (km/h) = (1000*t)/3600 (m/s),
so, the acceleration is 1000/3600 (m/s^2) by differentiation.

but i know the fact that
1 (km/h^2) = 1000/(3600^2) (m/s^2).

um...i can't my errors.
so, i need your advice.



.



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