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Questions and Answers
What is the stress experienced by a steel bar with a cross-sectional area of 3 cm² subjected to a tensile force of 30 kN?
What is the stress experienced by a steel bar with a cross-sectional area of 3 cm² subjected to a tensile force of 30 kN?
- 20 MPa
- 10 MPa
- 15 MPa (correct)
- 5 MPa
If a steel bar experiences an elongation of 0.5 mm under a tensile force, what would be the strain?
If a steel bar experiences an elongation of 0.5 mm under a tensile force, what would be the strain?
- 0.0005
- 0.0002
- 0.005
- 0.002 (correct)
For a material with a Young's modulus of 80 GPa, what is the stress when the strain is 0.0004?
For a material with a Young's modulus of 80 GPa, what is the stress when the strain is 0.0004?
- 40 MPa (correct)
- 320 MPa
- 10 MPa
- 20 MPa
In a material with a yield strength of 200 MPa and a tensile strength of 250 MPa, what force is needed to break a rod with a cross-sectional area of 2 cm²?
In a material with a yield strength of 200 MPa and a tensile strength of 250 MPa, what force is needed to break a rod with a cross-sectional area of 2 cm²?
Which property of a material determines if it will break after plastic deformation or at the yield point?
Which property of a material determines if it will break after plastic deformation or at the yield point?
Which mechanical property measures the resistance to pulling forces?
Which mechanical property measures the resistance to pulling forces?
What property of a material quantifies its stiffness?
What property of a material quantifies its stiffness?
Which property of a material measures its ability to deform permanently without breaking?
Which property of a material measures its ability to deform permanently without breaking?
What property of a material is a combination of strength and ductility/malleability?
What property of a material is a combination of strength and ductility/malleability?
Which mechanical property refers to the slow, time-dependent deformation of a material under constant stress?
Which mechanical property refers to the slow, time-dependent deformation of a material under constant stress?
