5. A rigid square sheet of glass of side 1 metre is supported at its corners on four identical stiff linear-elastic springs. A 100 N vertical force is applied to the plate at the location shown in Figure Q5. The increased vertical deflection of the springs is very small compared to the side length of the square. C -0.6 m- A -0.55 m- 100 N Figure Q5 full B (Hint, the forces in the four springs can be written in terms of three displacement related variables, the vertical deflection of corner A and the rotation of the sheet about its A - B axis and the rotation of the sheet about its A-C axis. Remember that the magnitude of the displacements is very small and use radians to describe the angles of rotation).