Question

If the length of a `24 cm` spring increases to `59 cm` when a `5 kg` weight is hanging from it, what is the spring's constant?

Answer 1

I found: `k=1.96N/m`

Explanation:

Consider the diagram:

Choosing the origin at the extreme of the un-extended spring:
at equilibrium:
`F_(el)-W=0`
`-ky=mg`
`-k(-h)=mg`
`-k(-25)=5*9.8`
`k=1.96N/m`