PSN-L Email List Message
Subject: Concerning "A vertical and horizontal sensing pendulum"
From: Randall Peters PETERS_RD@..........
Date: Wed, 13 Aug 2008 08:28:04 -0400
I am trying to understand the vertical response that you mention for
the system described at http://seismometer.googlepages.com/vh
With the pendulum hanging initially at equilibrium (center of mass
directly below the center of the ruby spheres) I can't envision any
physical mechanism for which a strictly vertical acceleration is capable
of producing motion.
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