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OSCILLATIONS, , Introduction, , In this chapter we will learn about oscillatory motion or oscillations. Any motion which repeats itself at regular intervals, of time is known as periodic motion. If a body moves back and forth repeatedly about its mean position then it is said to, be in oscillatory motion., , For example: The to and fro movement of pendulum, jumping on a trampoline, a child swinging on a swing., , Oscillations can be defined as Periodic to and fro motion which repeat itself at regular intervals of time., , , , Pic: To and fro motion of pendulum

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Pic: Kids jumping on the trampoline

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Periodic and Oscillatory motions, , , , Oscillations are defined as to and fro motion which repeat itself after regular intervals of time.In oscillations, the, frequency of vibrations iscomparatively less., , For example: The to and fro motion of a pendulum clock, , , , Vibrations are defined as movement of object about its mean position and this motion can be linear, circular, periodic or, non-periodic. If vibrations frequency is more and external force also acts on a body., , For eg: - Vibration of guitar string.When we move our fingers on the strings of guitar the strings vibrate so rapidly we can't, , make it out when it comes to its mean position and when it goes to extreme position because the frequency is very high, as a result it has vibratory motion.

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Oscillatory motion and Periodic Motion, , , , Every oscillatory motion is periodic motion that is every oscillatory motion repeats itself after the fixed interval of time., But every periodic motion is not oscillatory.For e.g.:- Motion of planets around the sun is periodic but is not oscillatory, motion.

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Equilibrium Position, , © Oscillating bodies comes to rest at their equilibrium positions. When a bob is suspended from a rigid support it goes, to extreme positions and then comes to its mean position which is also known as equilibrium position., , o Equilibrium Position is that position where an object tends to come at rest when no external force is applied., , Point of suspension, , , , Extreme a / c, Extreme, Position ., , * hheseaie Bevaneetee Position, , Equilibrium Position, , To and fro motion of the pendulum oscillating from its mean position B to its either extreme positions A and C resp.