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Question: please solve it step by step and tell why it...

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A solid, rectangular column has a length I, material E, and cross- sectional dimensions h and t as shown in the row (f) of table at the end. Use Sy 150 MPa for aluminum. Determine if its a Johnson or an Euler column and find the critical load 6 (a) If the boundary conditions are pinned-pinned (b) If the boundary conditions are fixed-pinned (c) If boundary conditions are fixed-fixed (d) If boundary conditions are fixed-free. TABLE FOR PROBLEM 6 Use only data that are relevant to the particular problem. Lengths in mm, forces in N. Row OD 20 20 25 46 100 70 300 800 85 50 160 200 400 200 120 150 70 85 400 200 100 500 350 180 280 100 150 100 180 250 100 150 10 20 steel steel steel alum alum alum steel steel steel alum alum alum steel steel 80 85 95 160 4 17 65 96 45 25 10 24 30 19 24 37 32 47 28 30 15 950 850 800 950 4 45 40 65 45 10 880 750 500 820 70 52 36 40 80

Please solve it step by step, and tell why it is johnson or euler column

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