Question 1

The built-up shaft consists of a pipe AB and solid rod BC. The pipe has an inner radius of 10 mm and an outer radius of 14 mm. The rod has a diameter of 12 mm. Determine:

The force at points D and E.
The average normal stress at points D. State whether the stress is tensile or compressive.
The average normal stress at points E. State whether the stress is tensile or compressive.

Question 2

The force applied at the handle of the rigid lever causes end A to be displaced 10 mm upward as shown in Figure 2. The wires are unstretched when the lever is in the horizontal position. Given the length All, AB, and CD is 30 cm and the length BC, GC, and FD is 50 cm. Determine:

The average normal strain developed in wire AH.
The average normal strain developed in wire CG.
The average normal strain developed in wire DF.
The angle of the rigid lever when end A to be displaced 10 mm upward.

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