In an indeterminate structure, the static equilibrium equations cannot sufficiently determine the internal forces and reactions on it. Consider a wobbling table with four cylindrical legs, each having a cross-sectional area of 1 cm2. The length of three legs is 2 m, while the fourth leg is longer by 0.50 mm. When a mass of 300 kg is placed, the legs are compressed, and the table is level and no longer wobbles. If the Young's modulus of the wooden legs is 1.3 x 1010 N/m2, determine the magnitudes of the forces acting on the legs. Recalling the Young's modulus equation, a relationship between the elongated leg and the shorter legs can be established. By balancing all the vertical forces acting on the system, the force on the elongated leg can be obtained. Comparing the equations of the elongated leg and substituting the values, the force on the shorter legs can be determined. By using the force equation and substituting the values, the force acting on the elongated leg can be obtained.