A typical compound archery bow requiers

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Discussion Overview

The discussion revolves around calculating the spring constant of a typical compound archery bow, assuming it follows Hooke's law. Participants explore the implications of this assumption in the context of the bow's mechanics during full draw.

Discussion Character

  • Mathematical reasoning
  • Debate/contested

Main Points Raised

  • One participant states that the force required to hold the arrow at full draw is 133 N and asks for help in calculating the spring constant using the formula k = W/x.
  • Another participant calculates the spring constant as 1.87 N/m based on the provided force and displacement.
  • A different participant argues that the problem is flawed because a compound bow does not have a constant spring constant, noting that the force required changes as the bow is drawn.
  • One participant humorously suggests that the previous calculation may be incorrect and provides a different numerical answer of 187.3.

Areas of Agreement / Disagreement

There is disagreement regarding the applicability of Hooke's law to the mechanics of a compound bow, with some participants asserting that the spring constant is not constant, while others focus on the mathematical calculation without addressing this concern.

Contextual Notes

Participants have not resolved the implications of the bow's mechanics on the spring constant calculation, and there are differing interpretations of how Hooke's law applies in this context.

r-soy
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A typical compound archery bow requiers a force of 133 N to hold an arrow at "full drwa " ( pulled back 71 cm ). ssunimg that the bow obeys hooke's law . what is its spring constant ?



did conver 71 to m

did use k = W/x to find spring constant ?



plese help me ?
 
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Hi

F =W/x= 133N/.71 m= 1.87N/m.



??
 
This is kind of a stupid problem. A compound bow is specifically constructed so that its "spring constant" is not constant. If you've ever pulled one, you know that it takes much less force to hold it at full draw than it does to get it there. For a spring, F=-kx tells you that the force increases steadily as you increase the displacement, whereas for a compound bow F increases, then decreases again until you get to full draw.
 
r-soy said:
133N/.71 m= 1.87N/m

Replace batteries in your calculator.
 
hhhhhhhhhhhh

loooooooool
sorry the answer is 187.3
 

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