Length of Spring at Equilibrium: Find Solution with Mass, Length & Constant

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SUMMARY

The equilibrium length of a spring with mass m, length l, and spring constant k can be determined by analyzing the forces acting on the spring. The equation F = -kx + mg must be set to zero to find the stretching distance x at equilibrium. The discussion highlights the challenge of solving the resulting differential equation, emphasizing the need for a clear understanding of the relationship between spring force and gravitational force. Reference to external resources, such as the Physics Forums link, provides additional context for solving this problem.

PREREQUISITES
  • Understanding of Hooke's Law and spring constants (k)
  • Basic knowledge of differential equations
  • Familiarity with gravitational force calculations (mg)
  • Concept of equilibrium in mechanical systems
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  • Study the derivation of the equilibrium position for springs under various loads
  • Learn techniques for solving differential equations in mechanical contexts
  • Explore the implications of mass on spring dynamics
  • Investigate numerical methods for approximating solutions to unsolvable equations
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Students and professionals in physics, mechanical engineering, and applied mathematics who are interested in understanding spring dynamics and equilibrium conditions.

FrozenWinters
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A spring of mass m, length l, and spring constant of k, is suspended. What is its length at equilibrium?

My current approach: look at the change in expansion relative to distance of the unexpanded spring. However, the differential equation I revive is unsolvable.
 
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F=-kx+mg...when does that equal 0? (This x gives the stretching)
 
FrozenWinters said:
My current approach: look at the change in expansion relative to distance of the unexpanded spring. However, the differential equation I revive is unsolvable.

That''s the right way to do it. See https://www.physicsforums.com/showthread.php?t=177689
 

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