Cap2001 Posted March 27, 2020 Share Posted March 27, 2020 Can anybody tell me how I can use the method of joints here? I know force T (22900) and force Weng (24525). I also know that I should start in point 5 I can't figure out what my equilibrium equations should look like. Fx= 0 en Fy=0 Link to comment Share on other sites More sharing options...
swansont Posted March 27, 2020 Share Posted March 27, 2020 What is the question that accompanies this drawing? Link to comment Share on other sites More sharing options...
Country Boy Posted March 27, 2020 Share Posted March 27, 2020 I would write every vector in terms of components. T= <-22900, 0>, Weng= <0, -24525>. The sum of those two forces is <-22900, -24525> and the two forces, "45" and "35" must offset that. Taking the force in vector "45" to be "x" and in vector "35" to be "y" we have "45"= <0, x> and "35"= <0.6y/1.34, 1.2y/1.34>= <0.45y, 0.90y>. The sum of those is <0.45y, x+ 0.90y> and that must equal <22900, 24525> so we have 0.45y= 22900 and x+ 0.90y= 24525. From the first y= 22900/0.45= 50,889. Then the second is x+ 45800= 24525 so x= 24525- 45800= -21275. So vector "45" is <0, -21275> and "35" is <50899(.45), 50899(.90)>= <22904.55, 45809.1>. The others are done the same way. Link to comment Share on other sites More sharing options...
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