Statement: Resonance is a special case of forced vibration in which the nature and frequency of vibration of the body are the same as the impressed frequency and the amplitude of forced vibration, is maximum.Reason: The amplitude of forced vibrations of a body increases with an increase in the frequency of the externally impressed periodic force.

Oscillations topis include: Oscillatory, periodic, and harmonic motions. Oscillations are repetitive variations that occur over time. They can be defined as the periodic change of a measure around a central value or between two or more states.  Some examples of oscillations include: A swinging pendulum Alternating current The up-and-down motion of a spring with a weight  Oscillations can also be described as a regular fluctuation in value, position, or state about a mean value.  In physics, some oscillations create waves. For example, a guitar creates sound waves, and you can make... Show more

Oscillations topis include: Oscillatory, periodic, and harmonic motions.

Oscillations are repetitive variations that occur over time. They can be defined as the periodic change of a measure around a central value or between two or more states. 

Some examples of oscillations include:
A swinging pendulum
Alternating current
The up-and-down motion of a spring with a weight 

Oscillations can also be described as a regular fluctuation in value, position, or state about a mean value. 

In physics, some oscillations create waves. For example, a guitar creates sound waves, and you can make water waves in a swimming pool by slapping the water with your hand. 

Periodic motion is a motion that repeats itself after equal intervals of time. It is characterized by angular frequency. 
Here are some examples of periodic motion:
A tuning fork
The motion of a pendulum
A rocking chair
A bouncing ball
A swing in motion
The Earth in its orbit around the Sun
A water wave
A girl swinging on a swing 

The motion of a mass on a spring can be described as Simple Harmonic Motion (SHM). 

Harmonic motion is a type of periodic motion that occurs when an object experiences a restoring force. The magnitude of this force is directly proportional to the distance of the object from its equilibrium position. The force also acts towards the equilibrium position.

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