I know that the stifness of the following springs are different.
But how to find their spring constant?
I think that
- one has the tension force is fully transmitted along the solid (but is it both?)
- but on which one the tension forces add their effects?
One will have $F=F_1=F_2$ for their tension force. I feel it's the first one but why? The other one should be $F=F_1+F_2$ but I don't understand why...
Then finding the spring constant should be easy. My problem is finding which paradigm to apply...