11-30-2020, 08:39 AM
I've just discovered this app - this is the most awesome!
I have a question regarding pendulum (or spring) experiment. I'm a bit confused about the meaning of the 'resonance' graph. Here's my screenshot when the phone was allowed to swing on a pendulum oscillating left-right, with a screen of the phone facing the user.
![[Image: Pendulum-2020-11-30-01-10-03.png]](https://i.ibb.co/cxz1pXF/Pendulum-2020-11-30-01-10-03.png)
how do I interpret that graph? I sort of understand the data points at ~0.83Hz - the amplitude gets smaller, the period stays the same - but what are the other data points?
Also, the results screen on that very experiment read that the period/frequency is 1.19s/0.84Hz (the same is shown on the Autocorrelation results screen). Shouldn't it be expected that the values on period/frequency match those on the autocorrelation (and they do) and on the Resonance results?
Finally, in the case of a practical pendulum, where due to practical limitations both the amplitude and the period change over time - is the frequency provided in the results the average frequency over the experiment time? If not - what is the logic used to give that frequency value?
thank you for creating such a useful application!
I have a question regarding pendulum (or spring) experiment. I'm a bit confused about the meaning of the 'resonance' graph. Here's my screenshot when the phone was allowed to swing on a pendulum oscillating left-right, with a screen of the phone facing the user.
how do I interpret that graph? I sort of understand the data points at ~0.83Hz - the amplitude gets smaller, the period stays the same - but what are the other data points?
Also, the results screen on that very experiment read that the period/frequency is 1.19s/0.84Hz (the same is shown on the Autocorrelation results screen). Shouldn't it be expected that the values on period/frequency match those on the autocorrelation (and they do) and on the Resonance results?
Finally, in the case of a practical pendulum, where due to practical limitations both the amplitude and the period change over time - is the frequency provided in the results the average frequency over the experiment time? If not - what is the logic used to give that frequency value?
thank you for creating such a useful application!