(Solved): 2) a) The plane pin-jointed truss shown in Figure Q2a is fabricated from elements with the same axia ...

2) a) The plane pin-jointed truss shown in Figure Q2a is fabricated from elements with the same axial stiffness (EA/L). Concentrated point loads, of magnitudes \( R \) and \( P \), are applied to joint C as shown. Solve for the horizontal and vertical displacements of joint C and state the required relative magnitudes of loads P and R for the vertical displacement to be zero. Clearly show the steps in your calculation and state assumptions made. Figure Q2a