So far we’ve been looking at free oscillations (where the maximum displacement remains constant).
Now we shall look at damped oscillations.
What is a damped oscillation?
A type of oscillation where its displacement decreases with time due to the presence of a resistive force.
Why does the displacement decrease?
The resistive force (friction etc) causes ENERGY LOSS in the form of HEAT.
There are a few types of damped oscillations, depending on the AMOUNT of damping:
|Lightly Damped /
|System oscillates with decreasing amplitude over time||Pendulum facing air resistance|
|Critically Damped system||Displacement decreases to 0 in the shortest time possible without oscillating||Car shock absorbers|
|Overdamped system||Displacement decreases to 0 more gradually without oscillating||Door damper|