Hooke's law - Natural Extension of Spring

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Discussion Overview

The discussion revolves around determining the natural extension of a spring when only the mass of a block and the spring constant are provided. Participants explore the implications of having no mass attached to the spring and how that affects the calculations related to Hooke's law.

Discussion Character

  • Homework-related
  • Mathematical reasoning
  • Conceptual clarification

Main Points Raised

  • One participant inquires about finding the natural extension of a spring using the mass of a block and the spring constant, expressing confusion about the situation when no mass is applied.
  • Another participant questions the value of force (F) when no mass is attached, suggesting that it should be zero and prompting a discussion about the implications for the extension (x).
  • A participant reflects on the relationship between the spring constant (k) and the extension (x), indicating uncertainty about their values when no force is applied.
  • Questions arise regarding the weight of the spring itself and its orientation (vertical or horizontal), which could affect the analysis.
  • Clarifications are made about the algebraic manipulation needed to isolate the variable x, emphasizing that k is not equal to x when no force is present.

Areas of Agreement / Disagreement

Participants express uncertainty regarding the calculations and relationships between force, extension, and the spring constant. No consensus is reached on how to approach the problem when no mass is attached.

Contextual Notes

The discussion does not address the mass of the spring itself, which may influence the overall analysis. Additionally, the lack of specific details about the spring's weight and orientation introduces further complexity to the problem.

Emz19
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Can I find out the natural extension of a spring if I am only given the mass of a block that can be put on it and the value of the spring constant? I have found x ( from the formula F = -kx ) when the block is on it but I now need to find the extension of the spring with no mass on the end. It is probably really simple but I am just a little stuck! Thanks
 
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With no mass attached, what is F? Plug that value in and solve for x. Or am I missing something?
 
well I thought with no mass the force is zero but then is the k equal to x? See, i was getting a big answer then for x and it didnt seem like the right answer. I am definitely missing something very obvious here
 
How heavy is the spring itself? Is the spring vertical or horizontal?
 
The spring is vertical and the question does not give the mass of the spring.
 
Emz19 said:
well I thought with no mass the force is zero but then is the k equal to x?

No, k is not equal to x in that case. Recall your algebra, you have to do the same thing to both sides to isolate the variable you want. Solve for x by doing the same thing to both sides then plug in 0 for mass/force (you can plug in the zero first, but its usually easier to solve first then plug in).
 
Ok great, thanks a mill :)
 

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