All objects have a natural frequency at which they vibrate. Resonance occurs when an external force is applied at the same frequency as this natural frequency, causing the amplitude of vibrations to increase. Examples given include the Tacoma Narrows bridge collapse caused by wind matching the bridge's frequency, a child pumping their legs at the swing's frequency to increase its motion, and a wine glass shattering when sung at its resonant pitch.

1. ResonanceResonance

2. ResonanceResonance
• All objects have natural frequencies
• Every object will vibrate at a certain
frequency
• Resonance- a condition that exists when
the frequency of a force applied to a system
matches the natural frequency of vibration of
the system.

3. Resonance DemosResonance Demos
• Go to the following link to watch a resonance
demo by Paul Hewitt
• http://www.freesciencevideo.com/conceptual
-physics-demo-of-resonance.html

4. Examples of ResonanceExamples of Resonance
• Example #1- Tacoma narrows bridge. The wind
blowing through the canyon watched the natural
frequency of the bridge and caused the bridge to
oscillate and eventually crumble

5. ExamplEs of REsonancEExamplEs of REsonancE
• Example #2- A kid on a swing, pumps their
legs at the same frequency each time to
cause them to swing higher each time. They
are matching the natural frequency of the
string.

6. Examples of ResonanceExamples of Resonance
• Example #3- A wine glass has a natural frequency.
A singer can sing at the same frequency and can
cause the glass to vibrate until it shatters

7. Examples of ResonanceExamples of Resonance
• Example #3- A wine glass has a natural frequency.
A singer can sing at the same frequency and can
cause the glass to vibrate until it shatters