Flashcards
Oscillations
Cards in this deck (10)
- 1Displacement Amplitude Period Frequency Angular frequency Phase differencedisplacement - distance from the equilibrium position
amplitude - the maximum displacement
period - the time for one complete oscillation
frequency - the amount of oscillations per unit time
angular frequency
angular frequency - product of 2 pi and frequency
phase difference - the amount by which one wave leads or lags another - 2Simple examples of free oscillationspendulum
mass on a spring - 3Define simple harmonic motionacceleration is directly proportional to displacement and is directed in the opposite direction to displacement
- 4Graphical illustrations of changes in displacement, velocity and acceleration during s.h.m.
- 5Interchange between kinetic and potential energy during s.h.m.
- 6Dampingan effect that reduces the amplitude of an oscillatory system
- 7Practical example of forced oscillations and resonanceBarton's pendulums
(Several pendulums of different lengths hang from a horizontal string, each has a natural frequency. The driver pendulum at the end oscillates and causes one of the other pendulums to oscillate with a large amplitude as they have the same length of the string.) - 8Graphically how amplitude of a forced oscillation changes with frequency near to natural frequency of systemResonance occurs when driving frequency matches the natural frequency, the amplitude is then a maximum
- 9Resonance is useful when...Useful: microwaves cause water molecules to vibrate. (microwaves used have a frequency that matches the natural frequency of vibration of water molecules. The water molecules in the food vibrate with a greater amplitude cooking the food.)
MRI radio waves cause nuclei to vibrate. - 10Resonance is a problem when...Engine vibrations causing car to shake.
Walking in step on a bridge or wind and bridge
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- A-Level Physics (Oscillations) Flashcards on Oscillations, created by Shpat Agushi on 23/01/2016.
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- Shpat Agushi
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