Task P5 Calculate the resultant thrust and overturning moment on a vertical rectangular retaining surface with one edge in the free surface of a liquid Question P5.1 A vertical retaining wall of width 1m contains water to a depth of 5m. (a) Calculate the mean pressure of the water against the wall. (b) Calculate the force of the water against the wall. (c) Calculate the turning moment about the bottom of the wall. Task P6 Explain Archimedes' Principle You are required to produce a power point presentation to explain to a senior engineer the Archimedes' Principle.