1. The problem statement, all variables and given/known data A harmonic oscillator oscillates with an amplitude A. In one period of oscillation, what is the distance travelled by the oscillator? 2. Relevant equations I'm not sure which equation applies if any? 3. The attempt at a solution My guess was 2A but the answer was 4A. I'm sure this is very easy, but can you please point me in the right direction?