Can someone define this physics concept...?

Pls give its exact and complete meaning thanks!10 points





a) frictional force


b) normal force


c) coefficient of friction


d) Angle of repose(limiting angle)

Can someone define this physics concept...?
a) The force arising at the interface of two surfaces preventing the relative motion between them is called the force of friction. The various types of frictional forces are 1)Static Fr. 2)Kinetic Fr. 3)Rolling Fr. 4)Fluid Fr (Viscosity)





b) It is the component of the contact force exerted by a surface on a body lying on it, perpendicular to the surface of contact.





c) The ratio of force of friction to the normal force is called the coefficient of friction.





d)Angle of repose is the maximum angle of inclination of a inclined plane for which a body lying on its surface remains at rest. (Also called angle of friction)
Reply:Why don't you look up the definitions in Wikapedia





for a) b) and c) go to





http://en.wikipedia.org/wiki/Friction





for d) go to





http://en.wikipedia.org/wiki/Angle_of_re...