Series of springs

If two springs, having different spring constants, are in a series (lined up, NOT parrallel): is the Force pulling the spring = (sum of spring constants)*(distance stretched) ?
No, no. If the force apply to the [tex]1^{st}[/tex] spring, the equation will be

[tex]F=k_1\Delta l_1[/tex]
so the same force is applied to both springs?
in other words, if F = kx:

but not F=(k1+k2)(x1+x2)
That's right, and the equivalent constant is


The Physics Forums Way

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving