stress strain and hookes law Flashcards
1
Q
define stress and formula and units
A
force per unit area of a material
Stress = force applied/cross sectional area
Pascals or Nm-2
2
Q
define strain and formula and units
A
strain ratio of change in length to original length
strain = change in length/originallength
no units
3
Q
define hooks law
A
stress is directly proportional to strain within the elastic limit
4
Q
formula for hookes law
A
F = k X e
Force = spring constant X extension
N = N/m X m
