Discussion
A material that undergoes large plastic deformations before breaking is considered:
Answer: A
A material that undergoes large plastic deformation before breaking is ductile, like mild steel or copper, which can be drawn into wires. A brittle material breaks with little deformation, 'elastic' refers to returning to shape after the load is removed, and 'stiff' refers to a high modulus of elasticity, so none of the other three describes large plastic deformation before failure.
Ductility is measured by percentage elongation and reduction of area in a tensile test; mild steel shows about 20 to 30 percent elongation, which makes it ductile.
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