Forces

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a place or object used for comparison to determine if an object is in motion

When two or more unequal forces act upon an object, resulting in a change or in motion or direction.

equal forces acting on an object in opposite directions

a force that opposes motion between two surfaces that are in contact

the combination of all forces acting on an object

When two or more equal forces act upon an object, resulting in no motion.

forces acting on an object that combine and form a net force that is not zero

an object's change in position relative to a reference point