Understanding Simple Harmonic Motion: Explained in Simple Terms

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Arun Raja
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Five small graphs labelled A to E, each plotting T on the vertical axis against x on the horizontal axis, showing candidate shapes for spring tension versus displacement.
 
Tension should be proportional to acceleration given by -w^2(x).
Thus tension and acceleration graph should be the same.
i think it is either A or D.
Please help me clarify.
 
Arun Raja said:
Tension should be proportional to acceleration given by -w^2(x).
Thus tension and acceleration graph should be the same.
i think it is either A or D.
Please help me clarify.
A and D show T=0 when x=0. Is this correct?