L3.12 Vertical massspring system 0/6 points (graded) Gravity does not change the frequency of oscillations of the mass on a spring, but it changes the equilibrium position of the mass down by a distance AL 2 mgr/k. A 3.0 kg mass is attached to the end of a 10 cm long spring that is hanging from the ceiling. The weight of the mass stretches the spring to a length of 13.5 cm. You pull the mass (further) down to a length of 15 cm and then release it. (a) What is the equation describing the position of the mass as a function of time? (b) What is the maximum velocity? At what values of a: does it occur? 3.14 m/s at 3.14 (c) What is the maximum acceleration of the block? At what values of a: does it occur? (d) At what time does the mass go through the equilibrium position for the first time? s X