Question

a load of 4 kg is subtended from celling through a steel wire of length 20 m and radius 0.2 mm it is found that the length of the wire is increased by 0.31 mm at equilibrium calculate the Young's modulus​

Answer 1

Answer:

For equilibrium

Weight = Tension

mg=T

∴T=4×3.1π=12.4πN (as can be inferred from the question)

Y=

△l/l

T/A

=

1000

0.031

/20

12.4π/π(

1000

2

)

2

=

4×0.031

12.4×20×1000×(1000)

2

=2×10

12

N/m

2

Explanation:

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