Viewing Correction to 'reference frames in newtonian physics'

Correct the sign in the accelerated observer example

Correction id:: 88
Filed on:: 2026-09-26 04:32:51
Status:: Pending
Type:: Erratum

Correction text:

If the free particle has constant inertial-frame velocity v and the observer has velocity u(t), then

v' = v - u(t).

Therefore

a' = dv'/dt = -du/dt,

not +du/dt.

This sign is physically important: if the observer accelerates in the +x direction, a free particle appears to accelerate in the -x direction relative to that observer.

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