What is dimensional analysis used for?

Dimensional analysis is like a "spell-checker" for your physics equations. It helps you check if an equation makes sense physically.

You break down every variable into its fundamental dimensions (Mass [M], Length [L], Time [T]). If the dimensions on the left side of the equals sign don't match the dimensions on the right side, then you know for a fact the equation is wrong!

It is a powerful trick I use to double-check my work during complex calculations.