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A tuning fork is vibrating at frequency ...

A tuning fork is vibrating at frequency `100 Hz`. When another tuning fork is sounded simutaneously.=, `4` beats per second are heard. When some mass is added to the tuning fork of `100 Hz`, beat frequency decreases. Find the frequency of the other tuning fork.

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`|f = 100| = 4 rArr f = 96` or `104`
when `1` st tuning fork is loaded its frequency decreases and so does beat frequency
`rArr 100 gt f`
`rArr f = 96 Hz`.
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