P6.1 - Further Mechanics Flashcards
What is critical damping?
Reducing displacement of oscillations to equilibrium in the quickest time possible.
Where do centripetal components act?
Towards the centre of rotation?
What is damping?
Dissipation of energy from an oscillating system?
What are forced vibrations?
Up and down oscillations at the frequency of the driver. Amplitude is inversely proportional to frequency.
What are free vibrations?
Vibrations not caused by a driver (vibrations at natural frequency).
What is overdamping?
When the system is damped more than required to stop the oscillations, and so it takes longer to return to equilibrium.
What is resonance?
When the frequency of the oscillations is equal to the natural frequency of the system. Rate of energy transfer is at a maximum at this point.
What is simple harmonic motion?
Motion where the acceleration is directly proportional and opposite to its displacement.
What is underdamping?
Where energy is gradually removed and the oscillations decrease slowly.
