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Which is not a characteristic of friction?


The force exerted by a surface to support an object is the _______.


Newton's _____ Law states that for every action there is an equal, but opposite reaction.


The unit of force is the _____.


An object is in equilibrium when


An object rests on a horizontal surface. What is the relationship between the object's weight and the normal force?


If the sum of all the horizontal forces acting on an object is zero, the object is in equilibrium.


If the sum of all the horizontal forces is zero and the sum of all the vertical forces is zero, the object is in equilibrium.