AQA AS Materials Flashcards
1
Q
Hooke’s Law
A
Force directly proportional to extension, up to the limit of proportionality.
2
Q
Stress
A
This is the force per unit cross-sectional area.
3
Q
Strain
A
Extension divided by its original length
4
Q
Young’s Modulus
A
This is the ratio between stress and strain
5
Q
Elastic Limit
A
The limit of proportionality past which there is plastic deformation.
6
Q
Yield Point
A
The stress beyond which a material becomes plastic.
7
Q
Elastic Deformation
A
This means that the object will return to its original shape when the deforming force is removed.
8
Q
Plastic Deformation
A
Doesn’t return to original length permanent deformation / permanent extension.
9
Q
Breaking stress
A
This is the maximum tensile (stretching) force that can be applied to an object before it breaks.
