A 0.5 kg object attached to the spring with a force constant of 8.00 N/m vibrates in simple harmonic motion with amplitude 10.0 cm. Determine the total energy of the system.

Why does the equilibrium position of the spring change when a mass is added to the spring? will the mass oscillate around the new equilibrium position of the spring or the previous position without a mass attached to the spring? if the equilibrium position of the spring changes by 20 cm (assuming no initial mass) when a mass is added to the spring with constant 4.9 kg/s^2, what is the mass of the object attached to the spring?