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Newton's First Law of Motion
Every object continues in a state of rest or of uniform speed in a straight line unless acted on by a nonzero force.
Inertia
The tendency of an object to maintain its state of rest or uniform motion unless acted upon by an external force.
Newton's Second Law of Motion
The acceleration produced by a net force on an object is directly proportional to the net force, is in the same direction as the net force, and is inversely proportional to the mass of the object.
Free fall
Motion under the influence of gravitational pull only.
Terminal speed
The speed at which the acceleration of a falling object terminates when air resistance balances its weight.
Force vector
An arrow drawn to scale representing the magnitude and direction of a force.
Velocity vector
An arrow drawn to scale representing the magnitude and direction of motion.
Resultant
The net result of a combination of two or more vectors.
Vector components
Parts in which a vector can be separated and act in different directions from the vector.
Newton's Third Law of Motion
Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first.
Air resistance
The force acting opposite to the relative motion of an object moving through the air.
Net force
The vector sum of all the forces acting on an object.
Acceleration
The rate at which an object changes its velocity.
Weight
The force exerted by gravity on an object, typically measured in newtons.
Mass
The amount of matter in an object, usually measured in kilograms.
Note 
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