CH13 Periodic Motion
Simple pendulum (΅₯°Ϊ)
Restoring force:
For small angle,
For large angular displacement
Physical pendulum
Restoring torque:
Damped oscillation (ΧθΔαΥρΆ―)
The decrease in amplitude caused by dissipative forces is called
damping
, and the corresponding motion is called
damped oscillation
.
Underdamping:
Critical damping:
Overdamping:
Energy in damped oscillations & forced oscillations
Dapming power:
the rate at which the damping force does negative work on the system.
Forced oscillation or driven oscillation
(ΚάΖΘΥρΆ―): a periodic driving force with angular frequency
.
Pre Page
Next page
.
