Example 9: Hydrostatic pressure & forces A lock on a canal is sealed by a gate that is 3.0m wide. The gate is perpendicular to the sides of the lock. When the lock is used there is water on one side of the gate to a depth of 3.5m, and 2.0m on the other side. a) What the hydrostatic force of the two sides of the gate? b) At what height from the bed do the two forces act? c) What is the magnitude of the overall resultant hydrostatic force on the gate and at what height does it act