Recently, a physics teacher found that 60 people walking on the bridge may collapse the bridge because of the resonance force. What is the resonance?
Resonance is a very high frequency term in physics. It refers to the situation that a physical system vibrates with a greater amplitude than other frequencies at a specific frequency; These specific frequencies are called resonant frequencies.
At resonance frequency, a small periodic vibration can produce a large vibration, because the system stores kinetic energy. When the resistance is very small, the resonance frequency is approximately equal to the natural frequency or natural frequency of the system, which is the frequency of free oscillation.
In nature, there are resonance phenomena in many places, such as acoustic resonance of musical instruments, orbital resonance between satellites of some wooden planets in the solar system, resonance of basement membrane in animal ears, resonance of circuits, etc. Humans also use or try to avoid resonance in their technology.