Bar AB is attached to collars that can slide on the inclined rods shown. A force P is appl...

Bar AB is attached to collars that can slide on the inclined rods shown. A force P is applied at point D located at a distance a from end A. Knowing that the coefficient of static friction µs between each collar and the rod upon which it slides is 0.30 and neglecting the weights of the bar and of the collars, determine the smallest value of the ratio a/L for which equilibrium is maintained.