Action force-	one pair of forces described in Newton’s 3rd law
Reaction force-	the force that is equal in strength and opposite in direction to the action force, which acts simultaneously on whatever is exerting the action force
Newton’s 3rd law-	whenever one body exerts a force on a second body, exerts an equal and opposite force on the first
Interaction-	a mutual action between objects where each object exerts an equal and opposite force on the other
Force-	any influence that tends to accelerate an object
Acceleration-	The rate at which velocity changes
Mass-	the measure of the amount of matter in an object
Weight-	the force on the body due to the gravitational attraction of another body