The motion of a 16.1 lb. particle is given by:

r(ϴ) = (5sin 2ϴ) ft, with ϴ(t) = πt/4 rad,

and t in seconds.

Determine the magnitudes of the particle’s position, velocity, acceleration, linear momentum, net force, and T (K.E.) at t = 2 s.

Explain the concepts of single and double lap roof coverings stating when each is used. Use sketches to illustrate your answer.

Give a brief account of the evolution of lintel forms. Highlight in your answer the problems associated with early lintel forms. Use sketches to support your answer.

What would be your criteria for hiring a subcontractor in construction projects? Provide justification for your points.

Work stress is identified as one of the key factors that negatively affects the performance of construction workers. In your opinion, what are the three main causes of work stress and how would you manage them?

Which of the following would be your top three biggest challenges the construction industry is likely to face in the future (say 2050 and beyond) and why?

Construction waste management
Lack of skilled workforce
Economic Sustainability
Environmental sustainability
Transition to new technologies
Health and safety management
Project complexity
cost of materials

The Universal Sustainable Development Goal 9 intends to “Build resilient infrastructure, promote inclusive and sustainable industrialisation and foster innovation”. How will you relate this goal to the recent mega construction projects in Australia? Give examples.

Obtain Continuity and İmpuls-Momentum Equations by drawing shapes.

1. Based on your understanding of timber, elaborate with examples the following topic:

i) strength and durability of timber

ii) sustainability concept of timber

iii) advantages and disadvantages of timber compared to concrete

(b)       Sketch a single storey house and indicate with reasoning the possible and suitable application of timber as structural and non-structural components of the house.

1. The annual precipitation measurements (Pi in cm) for M city, over a 20year period are shown in the following table. Determine the mean, standard deviation, and skew coefficient for this series.

2. Annual precipitation measurements (Pi in cm) for M City, were given in Problem 1. Determine the magnitude of the 10-year precipitation depth if the data fit:

1. the normal distribution.
2. the Gumbel distribution.

How many times was the P10 (normal) exceeded in the 20-year annual precipitation record given in Problem 1 ?

Please clarify each step of the solution