🚀 go-pugleaf

In response to Steve's message, there is a brief segment on the AAPT
Skylab Video that shows the determination of mass is a spacecraft.
P.S.  We still do the old PSSC Inertial balace lab.  It
differentialtes between "gravitational" and  "inertial" mass.
.>   There used to be an old experiment we did that actually measured
mass by determining the period of vibration of an object as it rode
on a platform attached to some springs.  This device would work even
in the far reaches of outer space, where the net gravitational force
on objects is negligible.  Try using a double pan balance in space!
To study body mass changes during orbital flight, astronauts actually
use a spring-mounted chair to measure their masses.