Materials

Question 1

What is the gradient of a force extension graph?

Answer 1

Force constant (spring constant)

Question 2

What is the area under a force extension graph?

Answer 2

Workdone, (elastic potential energy stored or strain energy)

Question 3

What is Young’s modulus?

Answer 3

a property of a material

Question 4

What does a high Young’s modulus mean?

Answer 4

The material is stiff

Question 5

What is the equation for young modulus?

Answer 5

stress/strain, pascals

Question 6

what is the equation for stress?

Answer 6

force/cross sectional area, pascals

Question 7

What is the equation for strain?

Answer 7

extension/original length

Question 8

What is a yield point?

Answer 8

A sudden change in behaviour/shape of graph

Question 9

What is the difference between plastic and elastic deformation?

Answer 9

Elastic will return to its original shape and structure, plastic wont.

Question 10

What is meant by the equilibrium position of atoms in a solid?

Answer 10

Theres no stress acting on the atoms.

Question 11

What is dislocation?

Answer 11

The atoms slipping on one another, when a material has dislocation they slipping much easier