Some Engineering Mechanics problems in the attached fileDocument Preview:All problems must be solved. Clear diagrams, coordinate systems, SI units of results, and any necessary explanations to clearly communicate your solution procedure will all contribute to the marks. Problem 1. A steel rod having a cross-sectional area of 0.005 m2 and length 3 m is attached to supports at both ends. Find (a) the force exerted by the rod on the supports if the temperature falls 60?????C and the supports are unyielding, and (b) the force exerted by the rod on the supports if they yield 0.0002 m while the temperature raises 50?????C. Take E = 210 GPa, coefficient of thermal expansion 10.5?10-6 ?????C -1. ?? Problem 3. A steel chimney is 28 m high, 1.4 m external diameter, and 20 mm thick. It is rigidly fixed at the base and is acted upon by a horizontal wind pressure of intensity 1.1 kN/m2 on the projected area. 2 2 The chimney weighs 74 kN per metre of height. Calculate the maximum stress in the chimney at the base. The chimney weighs 74 kN per metre of height. Calculate the maximum stress in the chimney at the base. Figure 1 Figure 2 Attachments: Eng-Mech.docx
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