Terms  Definitions 

Newton's Third Law 
Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first.

Vector quantity 
A quantity that has both magnitude and direction. Examples are force, velocity and acceleration.

Scalar quantity 
A quantity that has magnitude but not direction. Examples are mass, volume and speed.

Vector 
An arrow drawn to scale used to represent a vector quantity.

Resultant 
The net result of a combination of two or more vectors.

Components 
Mutually perpendicular vectors, usually horizontal and vertical, whose vector sum is a given vector.

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