Physics
Natural Frequency
Quick fact
A pendulum swings back and forth at its natural frequency, regardless of how hard or softly it is pushed.
Why this is interesting
Have you ever noticed a bridge shaking when a group of people walk in unison? It’s not magic—it’s natural frequency at work.
Read the full explanation
Understanding Natural Frequency
Natural frequency is the rate at which an object vibrates when disturbed. Imagine pushing a swing—once you let go, it keeps moving at its own unique rhythm, not because of your push, but due to its built-in 'vibration speed'. This is natural frequency.
A deeper explanation
Every physical system has a natural frequency determined by its mass and stiffness (or resistance to motion). When an object is disturbed, it oscillates around its equilibrium point. The restoring force within the system causes this vibration at a specific rate. Understanding natural frequency helps engineers design structures that avoid dangerous resonant frequencies, preventing failures like bridge collapses or broken glass.