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Circular motion and vibration defintions
- Module
- PH4 - Oscillations & Fields
- Institution
- WJEC
Key definitions of unit 3.1 and 3.2 A2 physics
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PeriodFree oscillations • The time it takes to complete damping
when an oscillatory system one circuit of an oscillation • The dying away, due Forced Vibrations
is displaced and released. to resistive forces, of when a sinusodically varying force is
Frequency the amplitude of free applied to an oscillatory system,
Simple Harmonic motion • The number of complete oscillations causing it to oscillate with the
when an object moves such oscillations per second. frequency of the applied force.
that it's acceleration is always directed critical damping
towards a fixed point and is proportional
Definitions • when the resistive forces become
to the distance from the fixed point. large enough to prevent oscillations
Amplitude occurring.
Angular Velocity • The maximum displacement
The angle swept out by the from it's equilibrium Resonance
radius per second of an position. • When the frequency of the
object describing a circular driving force is equal to the
path natural frequency, the amplitude
of vibrations in a system become
large.
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