EG1109 2007 Term 1 Quiz 1 Ans

EG1109 2007 Term 1 Quiz 1 Ans - BD F , and (3) the applied...

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EG1109 Statics and Mechanics of Materials Quiz 1 (2007/08 Semester 1) Question 1 (a) The bent bar ABC in Figure Q1 may be considered as a three-force member. Give a brief explanation why this statement is correct. (b) Making use of the fact that ABC is a three-force member, determine the magnitudes of the reactions at A and D . For simplicity, assume g = 10 m/s 2 . (10 marks) Member BD is a 2-force member. The three forces acting on member ABC are (1) the support reaction at A, A F , (2) the axial force due to member BD,
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Unformatted text preview: BD F , and (3) the applied action of 0.5 kN acting vertically through E. Thus, member ABC is a 3-force member. #(ANS) 1.0 kN BD F = #(ANS) 1.12 kN A F = Figure Q1 B A 60 o 50 kg D 0.5 m 30 o 30 o C E 1.5 m 1.0 m Question 2 Determine the axial forces in members IJ, BF, FJ and CJ of the truss shown in Figure Q2. (15 marks) 2 = #(ANS) kN BF F 4 = − #(ANS) kN IJ F 10 3 = − #(ANS) kN FJ F #(ANS) 4 kN CJ F = − K J I G F D C B A E 4 m 8 kN 4 m 4 m 4 m 2 kN 2 kN 3 m 3 m Figure Q2...
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This note was uploaded on 02/25/2011 for the course EG 1109 taught by Professor Prof during the Spring '11 term at National University of Singapore.

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EG1109 2007 Term 1 Quiz 1 Ans - BD F , and (3) the applied...

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