NEET
Exam NEET
Subject Physics
Chapter Mechanical Properties of Solids NEET · Physics · Mechanical Properties of Solids
A steel rod of length 2l, cross sectional area A and mass M is set...
A steel rod of length 2l, cross sectional area A and mass M is set rotating in a horizontal plane about an axis passing through the centre. If Y is the Young’s modulus for steel, find the extension in the length of the rod.
Options A δ = 2 3 Y A μ ω 2 l 2 \delta =\frac{2}{3YA}\mu {{\omega }^{2}}{{l}^{2}} δ = 3 Y A 2 μ ω 2 l 2 B 2 δ = 2 3 Y A μ ω 2 l 2 2\delta =\frac{2}{3YA}\mu {{\omega }^{2}}{{l}^{2}} 2 δ = 3 Y A 2 μ ω 2 l 2 C 2 δ = 2 5 Y A μ ω 2 l 2 2\delta =\frac{2}{5YA}\mu {{\omega }^{2}}{{l}^{2}} 2 δ = 5 Y A 2 μ ω 2 l 2 D δ = 2 5 Y A μ ω 2 l 2 \delta =\frac{2}{5YA}\mu {{\omega }^{2}}{{l}^{2}} δ = 5 Y A 2 μ ω 2 l 2 Correct answer B. 2 δ = 2 3 Y A μ ω 2 l 2 2\delta =\frac{2}{3YA}\mu {{\omega }^{2}}{{l}^{2}} 2 δ = 3 Y A 2 μ ω 2 l 2
Step-by-step solution
Correct Option is : (B)
2 δ = 2 3 Y A μ ω 2 l 2 2\delta =\frac{2}{3YA}\mu {{\omega }^{2}}{{l}^{2}} 2 δ = 3 Y A 2 μ ω 2 l 2
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