# How do you calculate acceleration of gravity?

Jun 10, 2014

Assume that air resistance is negligible. Equate the resultant force to the weight and then we get: $a = g$.

We can use the simplified version of Newton's Second Law, $F = m a$. This relates the resultant force acting on the object to its acceleration.

As air resistance is neglected the only force acting is the weight, so $F = w$.

$w = m g$, where $g$ is the gravitational field strength $9.8 N k {g}^{-} 1$.

$F = m g$, now use Newton's Second Law: $m a = m g$. The mass is the same on both sides of the equation: ⇒a=g=9.8 ms^-2