Further Mechanics Flashcards
What is the defining characteristic of Simple Harmonic Motion?
Acceleration is directly proportional to the displacement
In which direction is it the acceleration of an object in Simple Harmonic Motion?
Towards the midpoint
What is the Restoring Force in a pendulum?
Gravity
What energy transfer happens when an object moves with Simple Harmonic Motion towards the midpoint?
Potential Energy to Kinetic Energy
What is the equation for the force in a Simple Harmonic Oscillator?
F = -kx
What is free vibration?
Resonating at resonant frequency with the same amplitude forever
What happens when the driving frequency is less than the resonant frequency?
The two are in phase
What is resonance?
The system vibrates at the resonant frequency with increasing amplitude
How does resonance happen?
When the driving frequency equals the resonant frequency
What is damping
When an oscillating system loses energy to its surroundings
Give an example of a damping force
Air resistance
What is critical damping?
Reducing the oscillation amplitude in the shortest possible time
Give an example of a critical damping system
Car suspension
What is overdamping?
More than the critical damping. They take longer to return to equilibrium
Give an example of a damped structure
Taipei 101 uses a giant pendulum to damp oscillations by wind
