In the four-bar linkage system shown, let the circular guide with center at O be fixed and...

In the four-bar linkage system shown, let the circular guide with center at O be fixed and such that, when θ = 0°, the bars AB and BC are vertical and horizontal, respectively. In addition, let R = 2 ft, L = 3 ft, and H = 3.5 ft.

Figure P6.63

When θ = 0°, the collar at C is sliding downward with a speed of 23 ft/s. Determine the angular velocities of the bars AB and BC at this instant.