2. (a) A rectangular section metal bar has a width of 10 mm and can support...

Transcribed Image Text:

2. (a) A rectangular section metal bar has a width of 10 mm and can support maximum compressive stress of 20 MPa; determine the minimum breadth of the bar when loaded with a force of 3 kN. (b) If the bar in (a) is 2 m long and decreases in length by 0.25 mm when the force is applied, determine the strain and the percentage strain. 2. (a) A rectangular section metal bar has a width of 10 mm and can support maximum compressive stress of 20 MPa; determine the minimum breadth of the bar when loaded with a force of 3 kN. (b) If the bar in (a) is 2 m long and decreases in length by 0.25 mm when the force is applied, determine the strain and the percentage strain.