# Weighing scale reading in two different situations in which both my and the scale's proper accelerations are the same

If I'm standing on a weighing scale on the surface of the Earth, both I and the scale have the same proper acceleration of $$g$$ upwards, yet the scale reads non-zero.

But if both I and the scale are undergoing the same proper acceleration (say $$g$$) in empty space, then the scale will read $$0$$ (rather I won't be able to stand on the scale in any meaningful sense).

What's the difference? In both cases our proper accelerations are the same, yet there's zero reading in one and non-zero reading in the other scenario.