Question: 1. Determine the axial stress in a round steel bar subjected to 55kN of tension. The round bar measures 30 cm in diameter. Provide the stress value in kilopascals (kPa). If the bar is 1000 mm in length prior to loading and extends to 1000.04 mm length under tension, what is the resulting strain? [4 marks] 2. Determine the axial stress in a square steel bar

1. Determine the axial stress in a round steel bar subjected to $55\mathrm{kN}$ of tension. The round bar measures $30\mathrm{cm}$ in diameter. Provide the stress value in kilopascals (kPa). If the bar is $1000\mathrm{mm}$ in length prior to loading and extends to $1000.04\mathrm{mm}$ length under tension, what is the resulting strain? [4 marks] 2. Determine the axial stress in a square steel bar subjected to $22\mathrm{kN}$ of tension. The square bar is 10 $\mathrm{cm}$ wide. Provide the stress value in megapascals (MPa). [2 marks] 3. Determine the reactions for all of the three following simply-supported beams. Provide reaction values in kilonewtons $(\mathrm{kN})$. Show all work. [4 marks each] a) Assume the support at B is a roller. Neglect the thickness of the beam. b) Assume the support at A is a roller and B is a pin. c) Assume the support at B is a roller.