PH4 Circular motion Oscillations

angle swept out time taken

No. of revolutions per unit time.

When acceleration is proportional to displacement from a fixed point and directed towards it.

When a system (with a mass and a force pulling it back to equilibrium) is displaced from equilibrium and released.

When a system capable of natural oscillations is subjected to a periodically varying driving force.

• 1.If in forced vibrations, the frequency of the applied force is equal to the natural frequency of the system.  The amplitude of resulting oscillations is large.
• 2. At a certain driving frequency, there is a maximum peak in the amplitude of the oscillating load. At this frequency the system is at resonance.

The dying away of the amplitude due to resistive forces.

When the resistive forces on the system is just enough to prevent oscillations from occurring at all when the system is displaced and released.