- #1
songoku
- 2,290
- 324
Homework Statement
A light spring with a force constant k = 160 N/m rest vertically on the bottom of a large beaker of water (a). A 5 kg block of wood (density = 650 kg/m^3) is connected to the spring, and the block-spring system is allowed to come to static equilibrium (b). What is the elongation [tex]\Delta L[/tex] of the spring?
Homework Equations
F = kx
The Attempt at a Solution
I don't have idea to start. The spring rests on the bottom so when the mass is connected, I think the spring should be compressed rather than become longer. Maybe we should consider external force (I doubt this myself because there is no such thing in the question).
And why does the question mention density? The only thing I can come up with is to find volume of the block and I absolutely clueless what to do with the volume...
Thanks