Spring scales, load cells and strain gauges are single axis devices,
therefore they will only measure a component of the force acting
on the particle.
----- Original Message -----
From: Michael Edmiston<mailto:edmiston@bluffton.edu>
To: Forum for Physics Educators<mailto:phys-l@carnot.physics.buffalo.edu>
Sent: Monday, May 01, 2006 12:45 AM
Subject: Re: [Phys-l] Equations (causal relationship)
Furthermore, you can measure and/or feel the individual forces that add
to zero using spring scales or load cells with strain gauges. You do
not measure any individual accelerations that add to zero. Each of the
three forces adding to zero can be made manifest. Three accelerations
adding to zero cannot each be made manifest.