The uniform bar AB of mass m and length L is leaning against the corner with θ ≈ 0 when en...

The uniform bar AB of mass m and length L is leaning against the corner with θ ≈ 0 when end B is given a slight nudge so that end A starts sliding down the wall as B slides along the floor. Assuming that friction is negligible between the bar and the two surfaces against which it is sliding, determine the angle θ at which end A will lose contact with the vertical wall.

Figure P7.53