Crossbow Physics: Calculating Spring Constant, Tension Force & Power

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The discussion revolves around calculating the physics parameters of crossbows, specifically focusing on the spring constant, tension force, and power based on arrow velocity. Participants emphasize the importance of understanding whether the spring behaves linearly, as this affects the calculations of potential and kinetic energy. There is a consensus that integrating the variable force during the arrow's launch phase is necessary for accurate results, especially if friction is involved. The conversation also touches on the complexities introduced by the non-linear behavior of the spring and the need for differential equations to derive the time taken for energy transfer. Overall, the thread highlights the challenges of accurately modeling crossbow mechanics and the collaborative effort to refine calculations.
  • #51
Problem is that all responders - including myself - are now a bit uncertain as to what exactly we are trying to analyse .

So I'm trying to get a definite understanding of the mechanics of this cross bow . Is it the metal spring , the rubber rope or a combination of both that provides the driving force ?
 
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  • #52
Do you agree with JBA?
 
  • #53
Nidum said:
So I'm trying to get a definite understanding of the mechanics of this cross bow . Is it the metal spring , the rubber rope or a combination of both that provides the driving force ?

Amen!
 

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