P 9: The quarter circle gate BC in Fig. is hinged at C. Find the horizontal force P required to hold the gate stationary. The width into the paper is 3 m. P 2 m water C P.10. Gate AB in Fig. is a quarter circle 10 ft wide into the paper and hinged at B. Find the force F just sufficient to keep the gate from opening. The gate is uniform and weighs 3000 lbf. Water r=8 ft BO