lect542 - Vibrations and Waves When a vibration or an...

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Vibrations and Waves
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When a vibration or an oscillation repeats itself, back and forth, over the same path, the motion is periodic. The simplest examples: pendulum or oscillating of a coil spring.
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Restoring Force kx F - = Important : the restoring force F is not constant, but varies with position !
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At what points of trajectory does the restoring force have maximum? Zero?
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Some Terms: - displacement ( x ) : the distance x from equilibrium point at any moment; - amplitude ( A ): the maximum displacement; - one cycle refers to the complete go-and-fro motion from some initial point back to the same point; - period ( T ): time, required for one complete cycle; - frequency ( f ): the number of complete cycles per second.
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At what points of trajectory does the displacement of object have maximum? Zero? At what points of trajectory does the velocity of an object have maximum? Zero?
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What is the mutual direction of the displacement and acceleration while oscillatory motion?
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Oscillator
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lect542 - Vibrations and Waves When a vibration or an...

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