Solving a Physics Problem on Position vs Time Graph of Harmonic Motion

AI Thread Summary
The discussion revolves around a physics problem involving a position vs time graph of harmonic motion for a mass/spring system. The main question is identifying where the acceleration is greater than zero on the graph, which features points A, B, C, D, and E. The initial assumption was that acceleration is greater than zero between points B&C and D&E, but the provided options suggest otherwise. The clarification indicates that the second derivative represents acceleration, and the user is encouraged to refer to their textbook for a comparative graph of position, velocity, and acceleration. Understanding these relationships is crucial for solving the problem accurately.
dudgey
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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).

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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The problem might because the question asks greater than 0
 
Ok, I guess I should just think of it more that the second derivative is acceleration...
 
Go look in your Textbook there should be a graph comparing

Position vs Time

Velocity vs Time

Acceleration vs Time
 

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