When you force a material to vibrate at its resonate frequency, what's the path of movement it vibrates at?
example :: Tuning fork - strike the fork against any surface. Does it always vibrate on a single axis or radial arc?
reason :: I would like to create an experiment where I can force vibration to occur only on one axis; continually moving back and forth. This action, coupled with a magnetic coil, might generate enough electricity to power a small device.
Also, if an object keeps vibrating at its resonate frequency, will it eventually degrade?