Basics of Resonance
What is resonance?
Resonance is when a system vibrates with maximum amplitude because an external force matches its natural frequency.
How can you tell a coupled pendulum is in resonance?
The amplitude of oscillation increases noticeably, and energy is transferred efficiently between the pendulums.
Give an example of resonance in daily life.
A swing moving higher when pushed at the right rhythm, or a glass shattering when exposed to a sound at its resonant frequency.
Why does resonance occur in a system?
Resonance occurs because the frequency of an external periodic force matches the system’s natural frequency, causing energy to accumulate.
What happens to amplitude if damping is added to a resonance experiment?
The amplitude of oscillation decreases, and resonance is less pronounced.
How is resonance useful in musical instruments?
It amplifies sound, allowing instruments like guitars or pianos to produce louder, richer tones.
Name two systems that can show resonance.
Coupled pendulums, mass-spring systems, and tuning forks.
How can a tuning fork demonstrate resonance in another object?
When the fork is struck near a resonant object, the object vibrates at the same frequency without being touched.
Why can resonance be dangerous in engineering structures?
It can cause large oscillations that may damage or collapse structures, such as bridges or buildings, if the frequency of external forces matches the structure’s natural frequency.