stress

1. STRESS, STRAIN AND
YOUNG’S MODULUS

2. SRTESS:
 The stress applied to the wire is defined as the force applied per unit area of cross-
section.
 STRESS= ᵟ= force/cross sectional area
 ᵟ=F/A
The unit for stress is N/m

3. STRAIN:
AS result of the wire being stretched, it is under
strain. The strain is defined as the extension per unit
length.
STRAIN, ɛ=extension/original length

4. YOUNG,S MODULUS:
The strain produced in a stretched wire is proportional to the stress within the limit of
proportionality. Within this limit, the ratio is a constant whose value depend on the material of
the wire, and is known as the young’s modulus of the material.
i.e young modulus,
Y =(STRESS/STRAIN)
Y=(F/A)÷(x/l)
Y=F/A*L/X
Y=FL/AX
force equ; f=(ay/l)x