Question

A 50cm long wire of mass 20g support a mass of 1.6kg . find the fundamental frequency of the portion of the string between the wall and the pulley. (taking g=10ms)​

Answer 1

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★ the tension in the string is F,

$= > (1.6) \times (10ms)$

$= > 16n$

the linear mass density is,

$= > \frac{20g}{50cm}$

$= > 0.04kg \: m$

and the fundamental frequency is,

$v = \frac{1}{2l} \sqrt{ \frac{f}{u} }$

$= > \frac{1}{2 \times 0.4} \sqrt{ \frac{16}{0.04} }$

$= > 25hz$

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Answer 2

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