Physics - Elasticity Question with Solution | TestHub

PhysicsElasticityMiscellaneousEasy2 minQB

PhysicsEasymultiple choice

Passage / Comprehension

A 4.0 kg mass is hung from a vertical light steel wire 2.0 m long and $5.0 \times 1 0^{- 3} cm^{2}$ in cross-sectional area. The wire is securely fastened to the ceiling. (Young's modulus $= 2 \times 1 0^{11} N / m^{2}$ )

Choose the correct statement(s).

Options:(select one or more)

Answer:

Solution:

$Δ ℓ = \frac{M g ℓ}{A Y} = \frac{4 \times 10 \times 2}{5 \times 1 0 ^{- 7} \times 2 \times 1 0 ^{11}} = 8 \times 1 0^{- 4} m$

Stress and strain are tensor quantities, not vectors

Answer (A)

Stream:JEESubject:PhysicsTopic:ElasticitySubtopic:Miscellaneous

⏱ 2mℹ️ Source: QB

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