Question

Hi
I did a physics lab where we hung one spring with several different masses and found its K value, then hung another spring with several different masses and found its K value, then we joined both the springs together and hung several masses on it, and then found the K value for that double spring,
but how would i get an equation for the K value of the double spring...relating back to the individual springs...basically what is Ktotal based on K1 and K2
some help would be greatly appreciated!
thank you

Answer 1

The k of two springs connected end-to-end is given by

1/k = 1/k1 + 1/k2

That is because the combined deflection is F/k1 + F/k2 = F * (1/k1 + 1/k2)
Divide that by the sprint tension F for the spring constant.

How does that agree with your measurements?

Answer 2

it works perfectly, i understand! thank you so much!