The frame shown could be subjected to a variety of loads applied at different points. Consider the internal loads at pin A. Which of the following could represent the forces exerted on the pin. Forces act in the senses shown.

The 200 x 200 x 1,250-mm oak [E-12 GPa] block (2) shown is reinforced by bolting two 5 x 200 x 1,250 mm steel [E - 200 GPa] plates (1) to opposite sides of the block. A concentrated load of 300 kN is applied to a rigid cap. Assume P-300 kN, L-1.25 m. Determine (a) the normal stresses in the steel plates (1) and the oak block (2). (b) the shortening of the block when the load is applied. B (1) Answers: A₁- A₂- i Part 2 Calculate the cross-sectional area of each steel plate, A₁, and the cross-sectional area of the oak block, Az. i Save for Later P CL (2) C Answer: F₂/F₁- CL Save for Later CL (1) mm² mm² Derive a compatibility equation using force-deformation relationships substituted into a geometry-of-deformation relationship. Express the compatibility equation here as the ratio of the force in the oak block, F₂, to the force in each steel plate, F₁. Attempts: 0 of 1 used Submit Answer Attempts: 0 of 1 used Submit Answer

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P1 B D L ft 60° 60 30° 30° E L ft- -L ft- In the figure, L = 10, P1 = 750 lb, and P2 = 620 Ib. Compute the member forces listed below. In each case, tension is positive and compression is negative. [Hint: To find the distance from A to B, you could use the law of sines in triangle ABF. Or, you could first find the distance from C to B in the triangle BCE, which has a right angle at C.]