Question

A wire dimetre 4 mm & length 2 m extends . by 1.99 mm applying stress of 10 N . Find young modulus of material of the wire.​

Answer 1

Answer:

Given,

g=9.8m/s

2

m=8kg

l=4m

D=2mm

r=1mm=1×10

−3

m

Y=2×10

11

Nm

−2

Young's modulus of the iron wire,

Y=

Δl/l

F/A

Δl=l

Yπr

2

mg

Δ=4×

2×10

11

×3.14×(1×10

−3

)

2

8×9.8

Δl=0.5mm

Explanation:

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