A vertical gate is rectangular in shape with width, b and height h. The top of the gate is level with the surface of the water, where it is supported by a frictionless hinge H. A weight W hangs to the gate as shown below. The bottom of the gate rests against a stop. Atmospheric pressure acts everywhere. By neglecting the weight of the gate and the arm, determine the minimum weight W required to keep the gate close. ohinge h2 W