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A cantilever beam of cross section A, moment of inertia I and length L is having natural frequency ω1ω_1ω1​​. If the beam is accidentally broken into
Question

A cantilever beam of cross section A, moment of inertia I and length L is having natural frequency ω1ω_1​. If the beam is accidentally broken into two halves, the natural frequency of the remaining cantilever beam ω2 will be such that it

A.

Increases (ω2>ω1)(ω_2 >ω_1)​​

B.

Decrease (ω2<ω1)(ω_2 < ω_1)

C.

Remains same ω2=ω1ω_2 =ω_1​​

D.

Cannot be obtained from the given data

Correct option is A

The natural frequency of the remaining half-length cantilever beam (ω2) will be four times the original frequency (ω1):ω2=4ω1Key Points:1. Length Dependency: The natural frequency scales as 1L2. Halving the length quadruples the frequency.2. Assumptions: The beam is homogeneous and prismatic. No additional mass or damping is introduced after breaking.3. Practical Implications: Shorter beams vibrate at higher frequencies, which is critical in structural design and failure analysis.\begin{aligned}&\text{The natural frequency of the remaining half-length cantilever beam } (\omega_2) \text{ will be \textbf{four times} the original frequency } (\omega_1): \\&\omega_2 = 4 \omega_1 \\[1em]&\textbf{Key Points:} \\[0.5em]&1.\ \textbf{Length Dependency:} \text{ The natural frequency scales as } \frac{1}{L^2}. \text{ Halving the length \textbf{quadruples} the frequency.} \\[0.5em]&2.\ \textbf{Assumptions:} \\&\quad \circ \text{ The beam is homogeneous and prismatic.} \\&\quad \circ \text{ No additional mass or damping is introduced after breaking.} \\[0.5em]&3.\ \textbf{Practical Implications:} \\&\quad \circ \text{ Shorter beams vibrate at higher frequencies, which is critical in structural design and failure analysis.}\end{aligned}​​

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