SHM or Not??


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A  ball on an air track is attached to a compressed  spring  as shown in the animations (position is in meters and time is in seconds). Each of the 5 graphs CORRECTLY show a different property of the motion of the ball. Determine whether the green ball undergoes simple harmonic motion and state which graph(s) tell you this.  

Start Animation 1 Start Animation 2 Start Animation 3 Start Animation 4 Start Animation 5