Question regarding DIMENSIONAL ANALYSIS

[wenxian]

we can use the dimensional analysis to check the homogeneity of a physical quantity.
based on the question : ''can the equation V=ut + at be correct? '', we know that the LHS isn't the same as the RHS..
since the equation is not dimensionally homogenous,so it can never be correct..(the answer tat i got)
does it mean this equation is wrong?
then why we r still using this equation?

 

[Doc Al]

does it mean this equation is wrong?

Yes.

then why we r still using this equation?

You shouldn't be! Perhaps it just looks similar to one that is valid. Such as: v = u + at. (Note the differences.)

 

[technician]

I agree, it is wrong.
This is the value of dimensional analysis