Materials

Question 1

Hooke’s Law

Answer 1

The extension of a stretched elastic object is proportional to the force/load applied to the wire
Written as: F = k *delta L

Question 2

Elastic Limit

Answer 2

The force (or stress) beyond which the material will be permanently stretched

Question 3

Yield Point

Answer 3

The stress at which a large amount of plastic deformation takes place with a constant or reduced load

Question 4

Limit of proportinality

Answer 4

The point beyond which force is no longer proportional to extension

Question 5

Brittle fracture

Answer 5

When stress applied to brittle material, any tiny cracks at materials surface get bigger and bigger until material breaks completely . This process is called brittle fracture

Question 6

Brittle

Answer 6

A material that obeys Hooke’s Law and does not deform plastically, but snaps when the stress on it reaches a certain point

Question 7

Ultimate tensile stress

Answer 7

The maximum tensile stress a material can withstand