Stretching

Question 1

define extension

Answer 1

the extended length - the original length

Question 2

define Hooke’s law

Answer 2

the extension is directly proportional to the applied force up to the limit of proportionality

Question 3

what is the gradient in an extension/force graph

Answer 3

spring constant

Question 4

define the limit of proportionality

Answer 4

the place where F = kL breaks down, graph is no longer a straight line

Question 5

define the elastic limit

Answer 5

the place where the object does not return to its original form/length when the force is removed

Question 6

what is the gradient on a stress/strain graph

Answer 6

the young’s modulus

Question 7

what is the energy stored in a spring equal to

Answer 7

the work done stretching it

Question 8

what is work done here?

Answer 8

W = 1/2(F^2/k)