Calculating spring constant

  • Thread starter rola99
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  • #1
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Homework Statement



A spring having a free height of 4.25 inches is only 3.15 inches high when it supports a load of five pounds. What is the spring constant?

Homework Equations



k = (w2-w1)/(x2-x1)

The Attempt at a Solution



K = (5-0)/(4.25-3.15) = 4.55 lb/in

the book gives the right answer as 36.4lb/in

did I do anything wrong?
 

Answers and Replies

  • #2
Doc Al
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Your answer looks right to me.
 

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