Flashcards in Topic 4.3: Forces Oscillations and Resonance Deck (5)
• 4.3.1: State what is meant by damping
o Damping involves a force that is always in the opposite direction to the direction of motion of the oscillating particle and that the force is a dissipative force
o DAMPING: The loss of energy of oscillations due to work against friction or viscous medium. Can be heavy (over), light (under) or critical.
• 4.3.3: State what is meant by natural frequency of vibration
o NATURAL FREQUENCY: The frequency at which a system will oscillate naturally.
State what is meant is meant by forced oscillation
o FORCED OSCILLATIONS: Oscillations of a system which is being driven at another frequency than its natural one.
• 4.3.4: Describe graphically the variation with forced frequency of the amplitude of vibration of an object close to its natural frequency of vibration
As the natural frequency of the system is approached, the amplitude of the oscillations becomes greater