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I figure anywhere between 20 and 100 N/m. Someone correct me if I'm wrong on the answer, but no one will answer this with an example of the force it would take, only formulas.
If you think about it, 1 newton would take you about 2-5 cm, which would equate to [k=F/x] k=1N/0.02, resulting in k=50 N/m. That equation is saying if you would take a meter-long pen spring, it would take 50 neutons to compress it completely. Hope this helps.
- Fellow physics student
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