What Factors Influence the Spring Constant of a Rubber Band?

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SUMMARY

The discussion focuses on the factors influencing the spring constant of a rubber band, particularly in relation to Hooke's Law, expressed as F = -kx. The user conducted an experiment using a rubber band, measuring its extension under varying weights across three trials. Results indicated that the rubber band exhibited increased extension with each subsequent trial, suggesting a decrease in elasticity. This phenomenon raises questions about the rubber band's adherence to Hooke's Law and the underlying reasons for its changing elasticity during repeated use.

PREREQUISITES
  • Understanding of Hooke's Law and its mathematical representation (F = -kx).
  • Basic knowledge of elasticity and material properties.
  • Familiarity with experimental design and data collection methods.
  • Experience with measuring tools such as clamps and retort stands.
NEXT STEPS
  • Research the effects of repeated loading on the elasticity of rubber bands.
  • Explore advanced concepts in material science related to elasticity and plastic deformation.
  • Investigate the differences between elastic and plastic materials in practical applications.
  • Learn about the experimental techniques for measuring spring constants in various materials.
USEFUL FOR

Students conducting physics experiments, educators teaching material properties, and researchers interested in the mechanical behavior of elastic materials.

dilpreet28
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Hey

I am doing a practical on the spring constant of a rubber band, we have studied hooke's law and from that found that the spring constant of a spring is well F = -kx so F is proportional to x. While i did the same experiment with a rubber band, hung it on a clamp connected to a retort stand, added mass and measured the length, did this for 5 different masses, did 3 trials of each mass. What i found out was that in the 2nd trials the rubber band expanded more with the same masses, with the 3rd trial even more. What would be the reasoning behind this? does the rubber band follow Hooke's law in general? and what could be the reason of it extending more and more?

Thanks
 
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may be, the elasticity of the rubber bands decrease after experiment.

try to use the spring, its elasticity is hard to decrease. Because the stuctures are different, the changing of elasticity also different
 

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