Question #04b77

$F = m a$
Using the inertial mass $m$ we can apply a force $F$ and expect to see the acceleration $a$ for as long as the force is applied. Likewise, if we observe an acceleration and know the forces being exerted on an object, we can determine its mass.
$F = m g = 1 k g \cdot 9.8 \frac{m}{s} ^ 2 = 9.8 N$