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Hey guys I have difficulty to solve these two mechanics questions Can i get the solution step please 9231 n09 number 5 And j09 number 4 Thanks in advance

thanks you very much where did you get 6acos(alpha) when you take moment about A the normal contact force at D is perpendicular to surface but that force doesnot coincide with the stepladder so how you calculate that distance 6acos(alpha)

Hello guys I have difficulty to solve a question on equillibrium June 2007 number 3 paper 2 I need to check my step whether i did them well or not Thanks in advance