12 Normal ForceThe force exerted by the object in contact with another object perpendicular to the surface usually due to gravity.Ex. Your book on the table, the gravitational force is downward on the book but the normal force is upward from the table against the book.What is the sum of those forces?
13 Frictional ForcesStatic vs KineticFs is not in the direction of Fn, they are perpendicular or at an angle to eachother.
14 Kinectic FrictionAlways less than static frictionμs > μk why?Both frictional forces oppose the motion of the object across the other object
15 Ex. If my shoes have a static friction coefficient of 0 Ex. If my shoes have a static friction coefficient of 0.6 with the floor and I have a mass of 92 kg, what is the frictional force resisting my movement?