Forced vibrations and resonance (AQA A-Level Physics): Flashcards
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Practise the cards
10 cards from this deck
Free vibrations
Free vibrations
Oscillations at natural frequency without continuous external force
Natural frequency
Natural frequency
Inherent rate of oscillation of a system
Forced vibrations
Forced vibrations
Oscillations caused by external driving force
Driving frequency
Driving frequency
Frequency of the external driving force
Resonance occurs when
Resonance occurs when
Driving frequency matches natural frequency
Radio tuning uses resonance to
Radio tuning uses resonance to
Select desired broadcast signals
Resonance risk in bridges
Resonance risk in bridges
Violent oscillations cause structural damage
Damping
Damping
Reduction of energy in oscillating system
Critical damping ( value)
Critical damping ( value)
, oscillations cease quickly without overshoot
Damping widens resonance peak to
Damping widens resonance peak to
Make system less sensitive to driving frequencies
