|
|
 |
Amplitude: maximum displacement from equilibrium
Period: time for one cycle
Frequency: 
|
|
| |
Simple harmonic motion |
When the restoring force is proportional to the displacement from equilibrium, the oscillation is simple harmonic motion. |
|
trial solution:  |
 |
 angular frequency independent of amplitude |
 |
A is the amplitude and  is the initial phase angle (位相角) |
| |
Simple harmonic motion viewed as a projection |
|
Compare a SHM with a uniform circular motion with an angular velocity  |
 |
Circular motion:  |
Projection:  |
| |
Energy in SHM |
 |
|
| |
Vertical SHM |
|
 |
| |
Angular SHM-torsion pendulum (扭摆) |
Restoring torque:  |
 |
|
| |
Vibrations of molecules |
|
|
Lennard-Jones potential:  |
 |
|
