Application Point - Exact location at which a force is applied to an object, Magnitude - The size of a force is represented by the length of the arrow and measured in Newtons, Direction - Show by an arrow, Newton - The SI unit of force, Dynamometer - A device to measure forces, Friction - A force that opposes the motion of an object moving across a surface, Center of Gravity - Average location of the weight of an object, Equilibrium - State at which opposing forces are balanced, Perpendicular - When two forces have an angle of 90 degrees, Inertia - A tendency to continue in the same state of motion, Newton's First Law - The law of inertia, Newton's Second Law - The law of force and acceleration, Newton's Third Law - The law of action and reaction, Weight - The only force acting on an object in free fall, Tension - The two forces working on an object on a string are weight and ______, Normal Force - The force exerted by a surface perpendicular to the surface, μ - The coefficient of friction, Ff=μ*N - The equation for friction,

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