3.6.1.4
Resonance occurs when the driving frequency equals the natural frequency
Forced Vibrations & Resonance — AQA A-Level Physics
Key Definition
Natural frequency — The frequency at which a system oscillates when allowed to vibrate freely with no external driving force. Symbol: f_0.
Key Definition
Resonance — The condition where the driving frequency equals the natural frequency of a system, causing the amplitude of oscillations to increase to a maximum.
- At resonanceThe condition where the driving frequency matches the natural frequency of a system, causing maximum amplitude of oscillation and maximum energyThe capacity to do work. Measured in joules (J). transfer. (f = f_0), energyThe capacity to do work. Measured in joules (J). transfer from the driving force to the oscillating system is most efficient.
- The system gains more energyThe capacity to do work. Measured in joules (J). per cycle than it loses to dampingThe reduction in amplitude (and energy) of an oscillation over time due to resistive forces such as friction or air resistance., so the amplitudeThe maximum displacement of a point on a wave from its equilibrium (rest) position. Measured in metres (m). builds up.
- Maximum kinetic energyThe energy an object possesses due to its motion. occurs at resonanceThe condition where the driving frequency matches the natural frequency of a system, causing maximum amplitude of oscillation and maximum energy transfer..