Mechanical resonance is not something that was "created". It is a natural phenomenon that has always existed. It is the tendency of a system to oscillate with greater amplitude at certain frequencies.

Here's a breakdown:

* It's not an invention: Mechanical resonance is a natural phenomenon, not a product of human creation.

* It's a property of systems: All physical systems have natural frequencies at which they vibrate. When an external force matches one of these natural frequencies, the system will resonate, meaning it will vibrate with increased amplitude.

Examples of mechanical resonance can be found throughout history, even before humans understood the scientific principle:

* Musical instruments: The sound you hear from instruments like violins, guitars, or drums is a result of mechanical resonance.

* Swinging: When you push someone on a swing, you are applying a force that matches the swing's natural frequency, causing it to swing higher.

* Bridges collapsing: Famous historical examples of resonance leading to disasters include the Tacoma Narrows Bridge collapse (1940), where wind gusts matched the bridge's natural frequency, causing it to vibrate violently and ultimately collapse.

So, while there is no specific date for the "creation" of mechanical resonance, it is a fundamental concept in physics that has always been present in the natural world.