Question

A light spring of constant k = 158 N/m rests vertically on the bottom of a large beaker of water (Fig. P9.34a). A 5.55 kg block of wood (density = 650 kg/m3) is connected to the spring and the mass-spring system is allowed to come to static equilibrium (Fig. P9.34b). What is the elongation, ÄL, of the spring?

Answer 1

Wb = mg = 5.55kg * 9.8N/kg = 54.39N.
= Weight of block.

d = 54.39/158 = 0.344 m Elongated.

Answer 2

thats wrong (above)