I have a physics problem that I'm stuck on! Its a position vs time graph of harmonic motion of a horizontal mass/spring system. The question is "where is the acceleration greater than 0?". The graph starts at point A (at the origin), goes to B (above the x axis), down to C (on the x axis), down to D (below the x axis), and up to E (on the x axis).(adsbygoogle = window.adsbygoogle || []).push({});

I thought the answer should be between B&C and D&E because these (I think) would correspond to when the mass was going from a point with no kinetic energy to a point with maximum kinetic energy. This can't be right because the choices are A&B, A&C, C&D, C&E, B&D, both A&B and D&E. What's going on? Thanks :)

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# Homework Help: Harmonic Motion

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