4.1 Hookes Law

Question 1

Hookes law definition and equation

Answer 1

‘The extension of a spring, x, is directly proportional to the force applied to it, F, provided the limit of proportionality is not reached or exceeded’

F=kx

Question 2

Stress definition and equation

Answer 2

‘The applied force per unit area of cross section’

Stress=force/area

Question 3

Ultimate tensile stress definition

Answer 3

‘The maximum stretching force per unit area without material breaking’

Question 4

Strain definition and equation

Answer 4

‘The ratio of the change in length of a specimen to its original length’

Strain=change in length/original length

Question 5

Young’s modulus definition and equation

Answer 5

‘A measure of the stiffness of a material, determined by the ratio of stress divided by strain’

Young’s modulus = stress/strain

Question 6

Strain energy equations and what it is

Answer 6

E=strain energy/J
E=1/2Fx
E=1/2Kx^2

Question 7

M^2 to cm^2
Cm^2 to m^2

Answer 7

X10^4
•=•10^4

Question 8

M^2 to mm^2
Mm^2 to m^2

Answer 8

X10^6
•=•10^6

Question 9

M^3 to mm^3
mm^3 to m^3

Answer 9

X10^9
•=•10^9