Oscillations Flashcards
(12 cards)
Define displacement
Vector distance from equilibrium position
define amplitude
max displacement from equilibrium position
define period
time taken for a complete oscillation
define frequency
number of oscillations per second
SHM
- acceleration directly proportional to displacement but in opposite direction
- must act towards equilibrium
When would you use x= Acoswt
When oscillation begins at amplitude
when would you use x= Asinwt
when oscillation begins at origin
When is velocity at a maximum during an oscillation
When the object passes through equilibrium
When is velocity at a minimum during an oscillation
At the amplitude of oscillation, as the object changes direction
What is damping?
- when the amplitude of the oscillations decreases over time
- due to energy loss to resistive forces
Difference between free and forced oscillations
free - no external force applied, oscillated at natural frequency
forced - driving force applied, oscillates at particular frequency
what is resonance
when driving force = natural frequency