terminalvelocity		the unbalanced force acting on an object equals the objects mass times its acceleration
acceleration		the maximum velocity reached by a falling object that occurs when the resistance of the medium is equal to the force due to gravity
secondlaw		an object at rest remains at rest and an object in motion maintains its velocity unless it experiences an unbalanced force
inertia		In the meter-kilogram-second system, the unit of force required to accelerate a mass of one kilogram one meter per second per second, equal to 100,000 dynes.
weight		the measure of the quantity of matter in an object
freefall		the change in velocity divided by the time intervalin which the change occured
velocity		A measure of the heaviness of an object
force		the tendency of an object to remain at rest or in motion with a constant velocity
mass		The rate of speed of action or occurrence
newtons		the cause of an acceleration, or change in an objects velocity
thirdlaw		the motion of a body when only the force of gravity is acting on it
firstlaw		for every action force there is an equal and opposite reaction force