You apply a force of 216 N to a spring with a spring constant of 502 N/m. How far from the equilibrium position does the spring stretch? Report your answer in SI units, rounded to two decimal places.

When the displacement of a mass on a spring is 12a the half of the amplitude, what fraction of the mechanical energy is kinetic energy? at what displacement, as a fraction of a, is the mechanical energy half kinetic and half potential?