Problem.. a) For the system below, plot the total potential energy for different values of displacement at the loaded / free end of the spring. Using these data, what is the approximate minimum potential energy of the system and what displacement results in the minimum potential energy? b) Using the Principle of Minimum Potential Energy, determine the "exact" displacement that results in the minimum potential energy for the system? Show that this displacement results in a stable equilibrium position.

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mmetri Each part has a constant thickness with values indicated. 2.0 mm 1.5 mm 3.0 mm 2.0 mm A shear force, S₂ is applied. This results in shear flow, shown with red arrows, which has the following values: • Shear flow in part 13, just before point 3 - 38 N/mm Shear flow in part 23, just before point 3 = 44 N/mm Shear flow in part 43, just before point 3- 44 N/mm What is the shear stress in part 35, just below point 3? Express your answer in MPa, to 2 decimal places but without the units included. You have a 3% margin of error.

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