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Stress-Strain Graph for Metal Wire

Stress-Strain Graph for a metal wire

P	limit of proportionality
E	elastic limit
Y₁	yield point (weakens temporarily)
yield point	small increases in stress causes a large increase in strain
UTS	maximum tensile stress
B	breaking point

Force-Extension Graphs

spring - obeys Hooke's lawRubber band - extends easilyPolythene strip - 'gives' after the initial stiffness, extends a little, then difficult to stretch

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Specification: AQA Physics (7407), AS-level, 3.4.2.2 The Young modulus and 3.4.2.1 Bulk properties of solids. Topic: Materials.

Key terms in this lesson

Resistance: The ratio of the potential difference across a component to the current flowing through it, measured in ohms.
Resistivity: A property of a material equal to its resistance multiplied by its cross-sectional area and divided by its length; it does not depend on the dimensions of the sample.

More in Materials

All 18 lessons in Materials · All AQA AS-level Physics topics