# Two objects, no matter what their mass is, will reach the ground at the same time, because...?

##### 1 Answer
Nov 2, 2016

In an 1-D motion , There are three formulas
$v = u + a t$
${v}^{2} = {u}^{2} + 2 a s$
$s = u t + \frac{1}{2} a {t}^{2}$
In above formulas, there is no relation of mass. Why is it so ? is a good question. For answer , you can visit the webpage stated below:
http://physics.stackexchange.com/questions/11321/why-do-two-bodies-of-different-masses-fall-at-the-same-rate-in-the-absence-of-a