A spring with spring constant 31 N/m is attached to the ceiling, and a 5.0 centimeter diameter, 1.3 kilogram metal cylinder is attached to its lower end. The cylinder is held so that the spring is neither stretched nor compressed, then a tank of water is located underneath with the surface of the water just touching the bottom of the cylinder. When released, the cylinder will oscillate a few times but, damped by the water, quickly reach an equilibrium position.
When in equilibrium, obtain what length of the cylinder is submerged?