Newton's second law

Statement

$\vec{F} = m\vec{a}$ — $\vec{F}$ is the net force on the object, $m$ its inertial mass, and $\vec{a}$ its acceleration.

Why is it true?

Force does not cause velocity but a change in velocity; mass measures inertia — resistance to that change.

Topics that use this theorem

Related theorems

Step-by-step proofs

No step-by-step proof yet for this theorem.