Angle of friction, cone of friction / Law of friction / Equilibrium of a particle on a rough plane curve / Equilibrium of a particle on a rough space curve/ Equilibrium of a particle on a rough surface.

EqE
Angel of friction ::-
  Def::- 
           When two bodies in contact are in limiting Equilibrium the angel which the resultant reaction at the point of constant makes with the normal at the point is called the angel of friction. 
                    

    Cone of friction::-
  Def::- 
            When a cone in which the resultant force exerted by one flat horizontal surface on another must be located when both surfaces are at rest, as determined by the coefficient of static friction ie cone of friction. 

                    


1. Law of friction::-
2. Equilibrium of a particle on a rough plane curve 
3.  Equilibrium of a particle on a rough space curve 
4.  Equilibrium of a particle on a rough surface 











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