What is the difference between natural frequency and resonant frequency?

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Difference between natural frequency and resonant frequency:

Natural frequency Resonant frequency
1. The frequency at which a body vibrates if an external force is applied to it, this is known as a natural frequency. 1. When the resonant frequency is a type of natural frequency where a body vibrates at its highest amplitude.
2. For example: when you hit, struck or plucked any object. 2. For example: If collective oscillation force from vehicles caused a bridge to shake.
3. Natural frequency is denoted by $f$ 3. While resonance frequency is denoted by $f_{0}$

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what z d difference btween resonant frequency and angular frequency? what r their units?

ω_{0}

ω_{r}

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Natural frequency	Resonant frequency
1. The frequency at which a body vibrates if an external force is applied to it, this is known as a natural frequency.	1. When the resonant frequency is a type of natural frequency where a body vibrates at its highest amplitude.
2. For example: when you hit, struck or plucked any object.	2. For example: If collective oscillation force from vehicles caused a bridge to shake.
3. Natural frequency is denoted by $f$	3. While resonance frequency is denoted by $f_{0}$