For mechanical systems like a vibrating beam, what role does geometry play alongside mass and stiffness?

Answer

Geometry affects the effective stiffness of the structure, influencing the frequency calculation.

The physical geometry, such as length and cross-sectional shape, influences the effective stiffness of the structure and appears in the frequency calculation alongside $k$ and $m$.

For mechanical systems like a vibrating beam, what role does geometry play alongside mass and stiffness?
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