<p>As shown in Figure 3a, a pin connected framework ABC, consists of two rigid b

Question

<p>As shown in Figure 3a, a pin connected framework ABC, consists of two rigid bars AB<br />and BC, of negligible weight, each having a length b=400 mm. The bars are joined by a <br />linear spring of stiffness k=3 kN/m at their midpoints. Initially the spring is unstretched <br />and the framework has a pin support at A, and a roller support at C and is in equilibrium <br />at an angle &#945;=45&#186;, as shown in Figure 3a. <br />The roller support at C is removed and a block of mass m=10 kg is placed instead on the <br />floor. The static friction coefficient between the floor and the block is &#956;=0.2. <br />A vertical force F = 150 N is now applied on the new structure at joint B, resulting in <br />moving the block m to the right, stretching the spring. When the system reaches <br />equilibrium the angle between the bars and the horizontal will change from &#945; to &#952; (Shown <br />in Figure 3b). At this moment <br />&#160;Determine the angle &#952; after reaching equilibrium <br />&#160;Determine the reaction forces at pins A, B and C<br />&#160;What will be the increase in the spring length?</p>
<p>see for diagram</p>
<p>&#65279;<a href="https://elearning.sydney.edu.au/bbcswebdav/pid-923393-dt-content-rid-6081239_1/courses/2011_Semester_2_ENGG1802/ENG1802_Asignment1_2011_Final%282%29.pdf">https://elearning.sydney.edu.au/bbcswebdav/pid-923393-dt-content-rid-6081239_1/courses/2011_Semester_2_ENGG1802/ENG1802_Asignment1_2011_Final%282%29.pdf</a></p>
<p>&#160;</p>
<p>thankyou&#160;</p>

Explanation / Answer

pls show the figure

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