Which pair of quantities are the only ones that set the period and frequency of a simple harmonic oscillator?

1. The period of a simple harmonic oscillator is T = 2 pi sqrt(m/k). 2. Only the mass m and the force constant k appear in that expression. 3. Amplitude does not appear anywhere in it, so it cannot change the period or the frequency. 4. Maximum speed is itself a result of amplitude, mass and force constant, so it is not an independent cause. 5. Every option pairing amplitude with something else therefore fails on the same point. _Source: OpenStax College Physics (CC BY 4.0), Ch 16 "Oscillatory Motion and Waves", section 16.3 Simple Harmonic Motion: A Special Periodic Motion_