... the equilibrium point and the restoring force will be accurately described by Hooke's equation. The way to describe the relationship of the value of spring's movement over time is basic trigonometry. The way to show it in real life is to take a string and attach a weight to the end, and walk in a straight line while swinging the improvised pendulum back and ... path made by the pendulum would be a function. The period T would be represented the time of one complete back and forth movement of the wave, and that, according to the Trigonometry is . The Physics book (Serway / Faughn), obser...

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