NEWTONIAN PRINCIPLES

• A body at rest remains at rest, and a body in motion remains in constant motion unless an external force is applied

www.physicsclassroom.com/mmedia/newtlaws/mb.html

2nd Law of Motion:

• The net force applied to an object equals the resulting time rate-of-change of the object's momentum.

F = ma

(force equals mass times acceleration)

3rd Law of Motion:

• For every action force there is an equal an opposite reaction force.

www.howstuffworks.com/rocket1.htm