Sir Issac Newton's laws of motion?

First: Law of Inertia

" A body at rest remains at rest, & a body already in motion will remain in motion with a constant velocity in the absense of unbalanced applied force."

Second: Law of Acceleration

" The acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to the mass of the object."

Third: Law of Interaction

" When an object exerts a force on another object, the second object exerts on the first a force of the same magnitude but in opposite direction."

(by:TNJCA)