A dam holding back water in a reservoir consists of a vertical retaining wall 10m wide and 6 m high: The water has a density of 1000 kg m and the water level is 1 m from the top of the wall. When designing and building dams it is essential that engineers. understand the forces that will be acting on the dam so it can be made to withstand them. a) Calculate the resultant force exerted by the water on the dam. b) Calculate the position of the resultant force above the base of the retaining wall. c) Calculate the overturning moment acting around the base of the dam that the structure must be able to withstand.Explain why the structure of a metal makes it a good electrical conductor