A mass is hanging from the ceiling by a spring and is oscillating in simple harmonic motion. Which of the following will decrease its frequency of oscillation? Select answer from the options below Add a second spring in parallel with the first, attached to both the mass and the ceiling. Detach the spring from the ceiling and attach it to the wall, allowing the mass to oscillate horizontally on the frictionless floor. Add a second spring attached to the mass and the floor. Chop the mass in half. Add a second mass to the first, so it effectively becomes a larger mass