Ratio of frequency between heavier and lighter part of composite cord

[songoku]

Homework Statement

Please see below

Relevant Equations

v = λ.f

Is the answer 1? Because the cord is connected to vibrating source and it vibrates with a frequency of 100 Hz so section A and B have the same frequency

Thanks

 

[haruspex]

Homework Statement: Please see below
Relevant Equations: v = λ.f

View attachment 344025

Is the answer 1? Because the cord is connected to vibrating source and it vibrates with a frequency of 100 Hz so section A and B have the same frequency

Thanks

Either it is a trick question or they meant to ask for the ratio of wavelengths.

 

[Orodruin]

Yes, the frequencies must be the same. The speed of the waves and the wavelengths will differ.

 

[songoku]

Thank you very much haruspex and Orodruin

 

[Orodruin]

Either it is a trick question or they meant to ask for the ratio of wavelengths.

I would not call it a trick question. Realising that something conceptual does not change or when something is trivial is a very important skill in understanding a subject. For example, I keep asking relativity students a question where a muon travels a certain distance in the lab frame before decaying and I want them to tell me how far it travels in its rest frame. I keep asking because I have seen people get it wrong so many times and it illustrates something fundamental.