Magnitude - The size of a physical quantity, resultant force - The single force that could replace all the forces acting on an object, found by adding these together. If all the forces are balanced, the resultant force is zero, Scalar Quantaties - quantities that only have a magnitude or size, Vector quantaties - have both magnitude and an associated direction., length of an arrow - represents the magnitude of the quantity, Free body diagrams - used to describe situations where several forces act on an object., Two forces in the same direction - produce a resultant force that is greater than either individual force, Two forces in opposite directions - produce a resultant force that is smaller than either individual force,

Scalar and Vector quantaties

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