Geometry of Deformation Equation  
scene 5 of 11
The figure shows an L shaped rigid bar A B C D with a horizontal segment A B C of length 750 millimeters and a vertical segment C D of height 300 millimeters. The bar is pinned at C and supported by vertical and horizontal rods labeled 1 and 2 of length 600 millimeters and 150 millimeters at A and D respectively. The other end of the support rods is pinned. A load P which equals 80 kilo newtons directed vertically downwards acts at the point B which is 400 millimeters to the right of C. The bar is deflected downwards at the point A and deflected leftwards at the point D.

To determine how the axial deformations in rods (1) and (2) are related, sketch the deflected shape of the rigid bar. Since the load is applied downward at B, assume that the rigid bar will rotate as shown.