A-LEVEL PHYSICS: 4.7.5: Elastic & Plastic Behaviour (SaveMyExams)

Question 1

Materials can undergo 2 types of Deformation: (2)

Answer 1

-Elastic Deformation
-Plastic Deformation

Question 2

What is ‘Elastic Deformation’?

Answer 2

Elastic Deformation is Deformation that enables the Material to return to its Original Shape.

Question 3

What is ‘Plastic Deformation’?

Answer 3

Plastic Deformation is Deformation that the Material is Permanently Deformed (does not return to OG Shape).

Question 4

On a Force-Extension Graph, how can you determine the Elastic Region & Plastic Region? (2)

Answer 4

-Elastic Region: Straight Line through the Origin

-Plastic Region: Curved

Question 5

Explain ‘Brittle Materials’:
Give Examples
(3)

Answer 5

-Brittle Materials have very little to no Plastic Region.
-Brittle Materials break with little Elastic and almost zero Plastic Deformation.

Eg: Glass, Concrete

Question 6

Explain ‘Ductile Materials’:
Give Examples
(3)

Answer 6

-Ductile Materials have a Larger Plastic Region.
-The Material Stretches before Breaking.

Eg: Rubber, Copper