initial commit / add all books

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+clear all; clc;
+disp("Ex 6_19")
+disp("Free body diagram is shown in figure 6-32b")
+//Calculations
+
+//Applying equations of equlibrium to pulley B
+//We get two equations and we solve for each component
+//Solving by matrix method to obtain solution
+a=45*%pi/180
+A=[1,0;0,1]
+B=[490.5*cos(a);(490.5*sin(a))+490.5]
+C=inv(A)
+D=C*B 
+Bx=D(1)
+By=D(2)
+
+//Result
+printf('\n The values are \n')
+printf('\n Bx=%0.1f N\n By=%0.1f N\n',Bx,By)
+
+//For the equilibrium of the pin in X and Y directions
+E=[4/5,0;0,1]
+F=[(By+490.5);Bx+((3/5)*1660)]
+G=inv(E)
+H=G*F 
+F_CB=H(1)
+F_AB=H(2)
+
+//Result
+printf('\n The values are \n')
+printf('\n F_CB=%0.0f N\n F_AB=%0.0f N\n',F_CB,F_AB)