11. EXAMPLE Gate AB in Figure is a homogeneous mass of 180 kg, 1.2 m wide into the paper, hinged at A, and resting on a smooth bottom at B. All fluids are at 20°C. For what water depth h will the force at point B be zero? 2m Glycerin Water =12360- N Im m N YH20=9790- m³ 60° B