ENGINEERING MECHANICS ASSIGNMENT

QUESTION 1 (30 marks)

The plate is subjected to two forces at A and B as shown in Figure 1.

1. If Q(theta)=60, determine the magnitude of the resultant of these two forces and its direction measured clockwise from the horizontal. (15 marks)
2. Determine the angle Q(theta) so that the resultant of these two forces is directed horizontally to the right. Also, what is the magnitude of the resultant force? (15 marks)

QUESTION 2 (35 marks)

1. Take a photo or make a screenshot of a real life truss structure within UTS. Indicate the location of structure. If this is a screenshot, also cite the source of the photo in the report. Roof-support trusses and truss bridges are examples shown in Figures 2(a) to 2(d). (5 marks)
2. Identify the members of the truss, types of supports and joints. (5 marks)
3. Provide the drawings with the dimensions and scale based on measurement or estimation. (5 marks)
4. Specify the possible loads (magnitude and direction) acting on the structure (e.g. wind loading, vehicle loading, self-weight etc.). Justify your decision with references. Note it is acceptable to consider the simplified 2D problem (plane truss) if we are only interested in in- plane loads. Assume the loads are applied at the joints. (5 marks)
5. Draw Free Body Diagrams and determine the forces in all truss members. Please indicate the magnitude of force in each member and whether the members are in tension or compression. (15 marks)

QUESTION 3 (35 marks)

1. Take a photo or make a screenshot of a real life beam structure. Indicate the location of structure. If this is a screenshot, also cite the source of the photo in the report. Some examples are shown in Figure 3. (5 marks)
2. Identify the members of the selected structure, types of supports and connections. (5 marks)
3. Provide the drawings with the dimensions and scale based on measurement or estimation. (5 marks)
4. Specify the possible loads acting on the structure and justify your decision with references. (5 marks)
5. Draw Free Body Diagrams and determine the forces in all frame members. (15 marks)