Materials

Question 1

Ultimate tensile stress/ Breaking stress

Answer 1

Tensile stress needed to break a solid material

Question 2

Brittle

Answer 2

Snaps without stretching or bending when subject to stress

Question 3

Density

Answer 3

Mass per unit volume

Question 4

Ductile

Answer 4

Stretches easily without breaking

Question 5

Elastic limit

Answer 5

Point beyond which a wire is permanently stretched

Question 6

Elasticity

Answer 6

Property of a solid that enables it to regain its shape after it has been deformed or distorted

Question 7

Hooke’s law

Answer 7

The extension of a spring is proportional to the force needed to extend it up to the limit of proportionality

Question 8

Plastic deformation

Answer 8

Deformation of a solid beyond it’s elastic limit

Question 9

Stiffness constant (k)

Answer 9

The force per unit extension needed to extend a wire or spring

Question 10

Strain

Answer 10

Extension per unit length of a solid when deformed

Question 11

Stress

Answer 11

Force per unit area of cross section in a solid perpendicular to the cross section

Question 12

Yield point

Answer 12

Point at which the stress in a wire suddenly drops when the wire is subjected to increasing strain