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Feb25-13, 05:24 PM
P: 369
Quote Quote by rock.freak667 View Post
The spring constant k will be constant for a spring of given dimensions.

If you have a force F applied on the spring such that F = kx and you apply a second identical force then the extension 'x' will just double as well.
Thanks rock. You are right, I totally forget that the displacement should be changed too if I double the force.