# Use Newton's second law of motion to calculate the acceleration of a 7kg mass if a force of 68.6N acts on it?

$9.8 m {s}^{- 2}$
Seeing as the mass does not change we can use the simplified version of Newton's Second Law: $\vec{F} = m \vec{a}$.
$F = 68.6 N$ and $m = 7.0 k g$
vecF=mveca ⇒ veca=vecF/m=68.6/7.0=9.8ms^-2