Things to remember about Oscillations
- To-and fro movements of a system is called oscillations.
- All oscillation eventually die away as energy dissipates to the surroundings.
- At the equilibrium position, the resultant force on a particle is zero.
- Displacements vary from positive to negative to positive during the course of one oscillation.
- Amplitude is the maximum displacement from the equilibrium position.
Things to remember about Simple Harmonic Motion
- Simple harmonic motion (SHM) is an oscillation where the period remains constant even when the amplitude changes.
- A pendulum and a mass-spring system both oscillate with SHM.
- Plotting displacement against time from such an oscillator produces a sinusoidal graph.
- At the equilibrium position (zero displacement) velocity is maximum (either positive or negative) and acceleration is zero (since resultant force is zero).
- Positive and negative velocities show the body moving in opposite directions.
- At either position of maximum (either positive or negative) at the extreme ends and is always directed towards the equilibrium position.
- Acceleration increases with distance from it. It is proportional to displacement but in the opposite direction.
The is acceleration and displacement always have opposite sings....
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