1. Concrete, rocks, and bone are strong in compression and are usually designed for compressive loading. To test their strength in compression, what sort of test specimen would be useful?
2. Suppose that a downward force is applied at point A of the truss, causing point A to move 0.360 in downward and 0.220 in to the left. If the resulting extensional strain εAB in the direction parallel to the axis of bar AB is uniform, what is εAB?