Newton’s Laws of Motion

Newton’s First Law

Inertia: If no net force is exerted on an object, the object’s velocity will not change.

Newton’s Second Law

${\vec{F}}_{net}=m\vec{a}$ This second law is actually derived from momentum. When Newton came up with this law it was related to the change of momentum.

Newton’s Third Law

Action-reaction: Whenever one object exerts a force on another, it will experience a force from the other object that is equal in magnitude but opposite in direction to the force that it exerts.

${\vec{F}}_{2\to 1}=-{\vec{F}}_{1\to 2}$