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26.6, 7, 8 Concept Q
cdeutsch/ursuline
Question | Answer |
---|---|
Why do different objects make different sounds when dropped on the floor? | Because it depends on the elasticity and shape of the object. |
What are 2 factors that can affect the 'natural' frequency of an object? | Elasticity & shape |
Give 2 examples of forced vibrations. | tuning fork on a table a music box on a ledge |
When does resonance occur? | When the frequency of the forced vibration of an object matches the object's natural frequency. |
What effect does resonance have on the amplitude of waves? | Resonance increases the amplitude. |
How did resonance affect the Tacoma Narrows Bridge? | When the natural frequency of the marching soldiers matched the rhythm of the bridge, the bridge collapsed. Wind caused the increasing amplitude to eventually caused the bridge to collapse. |
Why is it dangerous for people in the balcony to stamp their feet in a steady rhythm? | Because the natural frequency will match with their stomping and cause the balcony to collapse. |