the apex of a trajectory versus free fall
- From: mm <NOPSAMmm2005@xxxxxxxxxxx>
- Date: Fri, 27 Apr 2007 05:32:51 -0400
When I was little and first heard about weightlessness training for
astronauts, I thought they put them in a plane, flew the plane at a
steep climb and the weightlessness occurred when the astronaut in
training was at the apex of the plane's climb, when he stopped going
up and before he started going down.
Almost the same thing I experienced when I was on a playground swing,
at the highest point of its travel.
I couldn't understand how this could take the 20 or 30 seconds they
said it lasted, as in the case of Steven Hawkings today.
Eventually I learned that the plane would dive and the passengers
would dive with it, and they were falling but the plane was falling at
the same speed, so it seemed to an observer, including the person
himself, that there was no gravity.
Not counting the length of time each lasts, is there any difference
between these two kinds of "weightlessness", reaching the apex of a
trajectory versus free fall?
If you are inclined to email me
for some reason, remove NOPSAM :-)
.
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