Acceleration vs Time Graph in Simple Pendulum

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The discussion centers on the confusion regarding the Acceleration vs Time graph of a simple pendulum, with some participants asserting it should be sinusoidal rather than straight lines. Clarification is sought on the relationship between acceleration, velocity, and displacement, emphasizing that acceleration is the second derivative of displacement. Participants debate the accuracy of the provided graphs, questioning their representation of the motion. The conversation also touches on the differences in graph shapes between a simple pendulum and a mass-spring system. Ultimately, there is a call for a correct representation of the graphs to better understand the motion dynamics.
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can anyone please explain
Acceleration vs Time Graph in Simple Pendulum ?
these would be straight lines but i don't know why
 
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The Acceleration vs Time graph would actually be a sinusoidal curve, not a straight line. Perhaps you were thinking of acceleration vs displacement. If so; start with the general displacement-time equation for a simple pendulum, use it to find an acceleration-time equation, and compare the two.
 
No its not sinusoidal , see the attached image , the third graph is Acceleration vs Time of Simple Pendulum ...why these are straight lines ?
and also see the second graph , why Velocity vs time is not sinusoidal but in Mass attached to spring it is Sinusoidal
 

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A simple pendulum approximately exhibits simple harmonic motion. My guess is that your graphs were just very crude approximations for the time derivative of the first graph.
 
what do you mean ??
please just explain the 3rd graph
 
What is there I am meant to explain. I'm telling you it's not correct. How much thought have you even put into this? Do you understand that velocity and acceleration are the first and second time derivatives of displacement respectively. Do the graphs you drew reflect that?
 
So can you show the correct Graph please ??

and in this image can you tell me where the velocity,acceleration is zero and where it is maximum

http://www.educationalelectronicsusa.com/p/images/wep-4.gif
 

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