A sonometer wire is under tension of $$64N$$ vibrating in its fundamental mode is in resonance with a vibrating tuning fork. The vibrating portion of the sonometer wire has a length of $$10cm$$ and mass $$1g$$. The vibrating tuning fork is now moved away from vibrating wire at a constant speed and an observer standing near the sonometer hears one beat per $$sec$$. Calculate the speed with which the tuning fork is moved, if the speed of sound in air is $$300m/s$$.

Question

Infinity Learn · Accepted Answer

$$f=12lTm=400Hzf1=fvv+u$$Δ$$f=f$$−$$f1=fuv$$

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