Legend

 Fnet = net force m = mass a = acceleration Fg = force of gravity

Dynamics

Though force is not motion, it is related to, or often results in motion.  Sir Isaac Newton established a relationship between forces and movement in the form of three laws:
 Law Definition Equations & terms 1st Objects move or remain still in the same way, as long as no net external force acts on them. Also known as law of inertia. 2nd A net external force (due to unbalanced forces) acting on an object affects the object's speed and/or direction; it causes an acceleration directly proportional to the amount of force applied and in the direction of that force. 1) Also known as law of acceleration. 2) Fnet = ma 3) Force has units of Newtons (N, where 1 N = 1 kgm/s2) 3rd Where do the forces come from? Other objects, and when one object exerts a force on a second, the second object exerts a force (same magnitude, opposite direction) on the first object. 1) Also known as law of action/reaction forces. 2) Forces that actually move an object must come from a different object
 Vector Kinematics Net Force