Formula of S in simple harmonic oscillation

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Discussion Overview

The discussion revolves around finding a function for the distance traveled (S) in simple harmonic oscillation, with the aim of simplifying the process of determining time from distance traveled, rather than the traditional method of solving for time from displacement using the formula x=Asin(ωt + φ).

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant proposes creating a function f(t)=S that represents the distance traveled, which would be one-to-one and always increasing, to simplify finding time from distance.
  • Another participant questions whether the original poster is seeking the total distance traveled after multiple cycles, suggesting that calculating the distance for whole cycles and adding the remaining fraction could be straightforward.
  • The original poster clarifies that they are not looking for distance from time but rather the inverse, emphasizing that using distance traveled could yield a single solution for time without the need to filter through multiple solutions.
  • A participant acknowledges the challenge of selecting the correct solution from a trigonometric equation and questions why using distance traveled would be any more difficult than the traditional method.
  • The original poster responds that the selection process can become complicated when dealing with time intervals between multiple points, indicating that their proposed method would be more beneficial in such cases.

Areas of Agreement / Disagreement

Participants express differing views on the feasibility and practicality of using distance traveled as a method for determining time in simple harmonic motion. There is no consensus on the effectiveness of this approach compared to traditional methods.

Contextual Notes

The discussion does not resolve the assumptions regarding the relationship between distance traveled and time, nor does it clarify the mathematical implications of the proposed function f(t)=S.

another_dude
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In school we have numerous exercises that ask you to find the time when a body passes a certain point for the nth time in simple harmonic oscillation. But it is a bit mentally taxing to solve with the actual formula of x=Asin(ωt + φ), just because you have to sort out all the infinite solutions. It is even worse when you get to more challenging tasks like for example having to find various time intervals when the body gets from point A to point B. So I was wondering if it is possible to have a function f(t)=S where S is the distance traveled . This function must be 1-1 ( S is always increasing) and thus give only one solution. Then it must be relatively easy to get S from x and the opposite for any other possible calculations.
 
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I am not absolutely sure about what you mean. Are you trying to find the distance traveled (as opposed to displacement) after a time that could include several cycles of the oscillation? The distance traveled for a whole cycle is easy to find. So you can calculate the number of whole cycles and add that to the distance in the remaining fraction of a cycle.
From your post, I gather that you can deal with the questions you have already be set in school so it should be fairly straightforward for you to extend it to multiple cycles. (If indeed that's what you are trying to do.)
 
You are correct. But I'm not trying to find traveled distance from time -in fact the opposite (time from distance travelled). The way it usually goes is you get displacement and in order to find time you solve the trig equation and filter out the solutions. But if you use distance traveled as a "middleman" you should get only one time and not have to sort out the solutions.
 
OK. A trig equation tends to have multiple solutions and you usually have to select the appropriate +2πn value. You still have to know the amplitude but why would it be any harder to do it that way round?
 
Because you have to think which value to choose. Doesn't sound that big a deal, but when dealing with time intervals between two or maybe more points it can get a bit messy. That's when I think the way I proposed would be most useful.
 

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