Oscillations Flashcards
What is period?
Time taken for one complete oscillation
What is frequency?
Number of oscillations per unit time
What is angular frequency?
w=2pif, rate of change of angular displacement measured in radians per second.
Amplitude?
Maximum displacement from the equilibrium position
Phase difference
Separation between 2 wave particles in the direction of the wave motion
What is simple harmonic motion?
Oscillatory motion in which the acceleration is always proportional to, and opposite in direction to the displacement from equilibrium position. (a=-w^2x)
What are the displacement time equation
X=Xosin(wt) or Xocos(wt)
What are the formulas for KE and PE?
KE= 1/2mv^2 PE= 1/2mw^2x^2
What is the formula for maximum velocity?
Vmax= Xo w
Total Energy formula
KE+PE= 1/2mw^2Xo^2
What is damping?
Loss of energy from an oscillating system to the environment, caused by dissipative force acting in opposite direction of motion of system
Light Damping?
System oscillates about equilibrium position with decreasing amplitude over a period of time
Critical Damping?
System does not oscillate and returns to equilibrium position in the shortest time possible.
Heavy Damping?
The damping is so great that the displaced object never oscillates but returns to its equilibrium position very very slowly.
When is a system undergoing free oscillations?
If the oscillatory motion is not subjected to an external periodic driving force and the system oscillates at its natural frequency.
