Question

if the strain is 0.001%then what will be the increase in length of a wire of 10 m length? The area of cross section of the wire is 2 mm'. If it is pulled by 1 kg-wt, what will be the stress?​

Answer 1

Answer:

Given,

Length of wire (L)=10 m

cross section (A)=2 mm

2

=2×10

−6

m

2

Loa d (m)=1 kg

So, Force =mg

=1×10

=10 N

00

and

L

ΔL

×100=0.001(ΔL=elongation )

L

ΔL

=1×10

−5

we know,

young’s modulus =

strain

Stress

=

(

L

ΔL

)

(

A

F

)

=

1×10

−5

2×10

−6

10

Y=4.9×10

11

N/m

2