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Homework Statement
A spring relaxed length is 0.5[m]. It is being pushed from both sides, and contracted to 0.4[m]. The force the spring is applying outwards is 3[N] on each side. What is the spring constant k?
Homework Equations
The Attempt at a Solution
I attempted drawing a force diagram, and then getting the equations out of it, but I got that the constant is 60 (6=0.1k - because total of force is 3+3=6[N]), although I know it is 30, but I can't get it right using the diagram and equations. What am I doing wrong?
Thanks!