4. Three identical bars support a rigid beam as shown. Load P acts as shown. a) Find the axial force in each bar in terms of Loa P. P PV -2L C RIGID BEAM Geometry SB = SA + Sc 2 FBD why use 2 Subtract? SA-28B + Sc= 18 (3) PA-2PB + P₁ = 0 ⒸPA + PB + PC = P -3PB APA 74 A A vp. APB B Deformations SA = PAh - Sp = Poh ; So = leh AE AE AE =-PPB=P/3 From Pe=P/12 From 1PA-70/12 Statics 2²Fy=0 OP₁ + PB+ Pc = P ZMA = D -P(L)+PB (2L)+Pe(4L) = 10 is the two suppose to be the left hand side between A&B? S₁ How do we find these final answers? what are the steps? SB why 4 in front & not 2? Sc

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Loads and Reactive Forces

Loads are the external influences that a beam experiences under its working conditions. For instance, a beam may be subjected to shear loads, twisting loads, bending moment, and axial loads during its working conditions. Engineers primarily deal with beams and trusses in the civil engineering domain. Due to the influence of loads, it is very crucial to determine the induced stresses and deformation values. These values give an insight into the critical area of the beam that needs to be worked upon to make it fail-safe.