The slender rod of length L and mass m is released from rest when θ = 0°. Determine as a f...

The slender rod of length L and mass m is released from rest when θ = 0°. Determine as a function of θ the normal and the frictional forces which are exerted by the ledge on the rod at A as it falls downward. At what angle θ does the rod begin to slip if the coefficient of static friction at A is μ?