The difference between an uniform, and an uniformly accelerated

It is a uniformly accelerated rectilinear motion (u.a.r.m.) in which the acceleration is gravity.

A motion is said to be uniformly accelerated, when starting from rest, it acquires, during equal time-intervals, equal increments of speed

Galileo defines a motion to be uniformly accelerated “when starting from rest, it acquires, during equal time-intervals, equal increments of speed.

In a vacuum, under the effect of gravity, any object, lead or feather, falls with the same uniformly accelerated movement (see the article The laws of dynamics).

It also describes in detail a machine, now known as Atwood's machine, to demonstrate the laws of uniformly accelerated motion due to gravity.

WEB - sometimes Fulling–Davies–Unruh effect) is the prediction that an accelerating observer will observe blackbody radiation where an inertial observer would observe none.