SHM and why does the frequency not decrease?

Click For Summary

Homework Help Overview

The discussion revolves around the concept of simple harmonic motion (SHM) and the effects of damping on frequency and amplitude. Participants are exploring why the frequency remains constant despite the presence of damping, as well as the behavior of positive and negative peaks in the context of oscillations.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to understand the relationship between damping and frequency, questioning why frequency does not decrease with energy loss. They also inquire about the specific behavior of positive peaks in a damped oscillation.
  • Some participants question the assumption that frequency should decrease with damping, noting that for a harmonic oscillator, frequency is independent of amplitude.
  • There are requests for clarification regarding the observation that only positive peaks appear to decrease.

Discussion Status

The discussion is ongoing, with participants providing insights into the nature of harmonic oscillators and damping. There is a mix of interpretations regarding the behavior of peaks, and some guidance has been offered regarding the independence of frequency from amplitude in harmonic motion.

Contextual Notes

Participants are grappling with concepts related to damping in oscillations and the implications for frequency and amplitude, indicating a need for further exploration of these ideas. There are references to external resources that may provide additional context or examples.

Dima Petrukhin
Messages
10
Reaction score
0
Hello, I don't get it why does the frequency not decrease? As this i assume is damping and frequency must change.
And why do only positive peaks decrease?2 Not sure about equations needed.

3.I thought that as it is damped, Energy is lost as heat. Thus speed decreases, therefore, it takes a longer time to complete an oscillation.Thus, frequency decreases, however, the mark scheme says that it is constant
The part about decreasing peaks is due to damping(I assume) but I do not have a clue why only positive peaks decrease.

Please help, I am very confused. Thanks
 

Attachments

  • Screen Shot 2018-03-24 at 23.43.48.png
    Screen Shot 2018-03-24 at 23.43.48.png
    39.7 KB · Views: 553
  • Screen Shot 2018-03-24 at 23.43.56.png
    Screen Shot 2018-03-24 at 23.43.56.png
    5 KB · Views: 536
  • Screen Shot 2018-03-24 at 23.53.20.png
    Screen Shot 2018-03-24 at 23.53.20.png
    17 KB · Views: 526
Physics news on Phys.org
Why would the frequency decrease? For a harmonic oscillator frequency is independent of amplitude.
 
Orodruin said:
Why would the frequency decrease? For a harmonic oscillator frequency is independent of amplitude.
thanks for your reply.
can you please help me with the 2 bit? why only +ve peaks decrease?
 
Dima Petrukhin said:
... only +ve peaks decrease?
Where are you getting this?
 

Similar threads

Diffraction pattern from a grating
  • · Replies 3 ·
Replies
3
Views
1K
Difference between resonance in undamped vs damped mass-spring-dashpot
  • · Replies 17 ·
Replies
17
Views
3K
Longer pendulum, does frequency need to be increased or
  • · Replies 4 ·
Replies
4
Views
2K
Eddy currents in Faraday's Law Experiment
  • · Replies 3 ·
Replies
3
Views
2K
Why does increasing the message bandwidth decrease the FM bandwidth?
  • · Replies 5 ·
Replies
5
Views
2K
Why Does Covering One End of a Pipe Change the Pitch of the Sound Produced?
  • · Replies 3 ·
Replies
3
Views
2K
How Does the Amplitude of a Pendulum Affect Timekeeping in Clocks?
  • · Replies 7 ·
Replies
7
Views
2K
Why does a diamagnetic rod align perpendicular to a magnetic field?
  • · Replies 8 ·
Replies
8
Views
3K
How does radius affect frequency in uniform circular motion?
  • · Replies 17 ·
Replies
17
Views
9K
Explaining Why Sand Loses Contact with Cone During Oscillation
  • · Replies 12 ·
Replies
12
Views
3K