Calculate what K (Spring Constant) my spring should have

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Discussion Overview

The discussion revolves around calculating the spring constant (K) for a spring that is intended to stretch to a specific length (L) while returning to its original position without plastic deformation. Participants explore different equations related to spring mechanics and energy conservation.

Discussion Character

  • Technical explanation
  • Mathematical reasoning

Main Points Raised

  • One participant seeks assistance in determining the spring constant K based on desired spring behavior.
  • Another participant references Hooke's law, stating the fundamental equation F = -k * delta-x, and questions if others are familiar with it.
  • A participant suggests using the equation mgh = (1/2)kx^2, questioning its applicability beyond conservation of energy.
  • Another reply indicates that the energy conservation equation can be used if gravitational force is responsible for the displacement.

Areas of Agreement / Disagreement

The discussion includes multiple viewpoints regarding the appropriate equations to use for calculating the spring constant, indicating that no consensus has been reached on a single method or approach.

Contextual Notes

Participants have not clarified the specific conditions under which the equations apply, nor have they resolved the assumptions related to the forces acting on the spring.

Tolale
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Hi!
Well, I need to calculate what K (Spring Constant) my spring should have. I want my spring to be stretched a certain length L, and always go back to its original position (no plastic deformation).
Can someone help me?

Thanks
 
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Tolale said:
Hi!
Well, I need to calculate what K (Spring Constant) my spring should have. I want my spring to be stretched a certain length L, and always go back to its original position (no plastic deformation).
Can someone help me?

Thanks

The fundamental spring equation is F = -k * delta-x Are you familiar with this equation?

http://en.wikipedia.org/wiki/Hooke's_law

.
 


Could you use the formula mgh=(1/2)kx^2 also? or is that just for the conservation of energy?
 


dreit said:
Could you use the formula mgh=(1/2)kx^2 also? or is that just for the conservation of energy?

That can be used if it's gravitational force that causes the displacement...
 

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