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# It's a scientific fact

## It's a scientific fact - Physics Forum

### It's a scientific fact - Physics Forum. Discuss and ask physics questions, kinematics and other physics problems.

#11
03-23-2005, 01:02 PM
 PD Guest Posts: n/a
It's a scientific fact

Don1 wrote:
average

And surely you realize that this rate of change of position only
applies for the first second, that is, the amount of distance covered
in the first second is 16.08 ft. The amount of distance covered in the
second second is 48.2 ft. If this comes as a surprise to you, consider
that if it covered the same distance in the next second, it wouldn't be
accelerating.

Finally, you should note that so-called terminal velocity comes when
this acceleration of free fall (g) is NOT a good description of real
free fall, because of the growing influence of air resistance.

PD

#12
03-23-2005, 03:11 PM
 Don1 Guest Posts: n/a
It's a scientific fact

PD wrote:
Snip<

the
consider
be
The distance a body falls at Earth's surface is about:
[s=(16.08'/sec^2)t^]

We're talking free fall "in vacuum"; where there's no terminal
velocity: Unless of course, there's a newtronian star involved(;^))

Don

#13
03-23-2005, 07:35 PM
 Don1 Guest Posts: n/a
It's a scientific fact

Don1 wrote:
snip<
Make that s=(16.08'/sec^2)t^2 !!! It will fall 16.08' in 1sec^2=
16.08'; 16.08' in 2sec^2= 64.32; 16.08' in 3sec^2= 144.72'; 16.08' in
4sec^2= 257.28'; 16.08' in 5sec^2= 402'....

Don

#14
03-24-2005, 01:18 PM
It's a scientific fact

How much time is a squared second?

Tom Davidson
Richmond, VA

#15
03-27-2005, 06:53 PM
 Don1 Guest Posts: n/a
It's a scientific fact

It's 1 sec^2. I recently asked somebody what a square second was; I
doubt I'll ever get an answer(:~))

#16
03-27-2005, 06:54 PM
 Don1 Guest Posts: n/a
It's a scientific fact

It's 1 sec^2. I recently asked somebody what a square second was; I
doubt I'll ever get an answer(:~))

#17
03-27-2005, 11:49 PM
 Kevin Coyle Guest Posts: n/a
It's a scientific fact

(Ok this is my first post so be kind!)
If you multiply the unit second by a second it no longer remains a unit of
time, therefore it has no logical duration. So basically a second^2 has no
duration because it is actually not a unit of time.

Cheers,
Kevin
"Don1" <[Only registered users see links. ]> wrote in message

#18
03-28-2005, 12:40 AM
It's a scientific fact

"Kevin Coyle" <[Only registered users see links. ]> wrote in message
news:qwI1e.1206\$[Only registered users see links. ].net...

You are correct, sir.

idiot.

Uncle Al and a few other accomplished flamers around here find him
inspirational.

I find him tedious and inane, but I occasionally like to jab him with a
loaded question, just to get him to expose another unguarded flank.

#19
03-28-2005, 01:34 PM
 Don1 Guest Posts: n/a
It's a scientific fact

Kevin Coyle wrote:
unit of
has no
OK, I'll be kind, and try to explain this the way I see it: A second^2
is the way 1 sec^2 is usually designated: Actually it might be clearer
if it was designated 1^2 second = 1 second; 2^2 seconds = 4 seconds;
3^2 seconds = 9 seconds.... However the usual "customary designation"
is sec^2 - with the _one_ implied; wouldn't ^2 sec raise eybrows? To
continue with the customary designation: 2sec^2 = 4 seconds; 3sec^2 = 9
seconds.... Anyways, I've done it both ways.

Recently I posted a "formula" for plotting the distance (s) that a body
free falls at Earth's surface; in vacuum:

s=(16.08'/sec^2)t^2 !!! It will fall 16.08' in 1sec^2= 16.08'; 16.08'
in 2sec^2= 64.32; 16.08' in 3sec^2= 144.72'; 16.08' in 4sec^2= 257.28';
16.08' in 5sec^2= 402'....

Even though Galileo was first with the equation: s = 16'/sec^2, it
never quite caught on, nor was it carried out to any great extent.
You'll notice that Newton's acceleration due to gravity is: [g =
2s/t^2], and therefore [g/2 = s/t^2]. I've been making a _lot_ out of
this and stirred up quite a controversy; to the chagrin of a few
jealous professionals.

The problem is that there are some here who _are_ so smart that they
have a bad case of superiority complex, and can't abide anyone else
taking their limelight:

To quote Ed Green in a recent post to this group: "...where respondent
number of grounds. One places the bait, waits for a response, and
pounces...." This is a metnod used by some with "steeltrap minds" to
stonewall and exhaust the subject matter. and boost their own egos.

Now I can't imagine Tom Davidson - as smart as he is - asking me
seriously what a sec^2 is. He's got to be putting me on: Stonewalling
and trying to discourage, and exhaust me.

That's why he wrote:

is an
idiot.

"Uncle Al and a few other accomplished flamers around here find him
inspirational.

"I find him tedious and inane, but I occasionally like to jab him with
a
loaded question, just to get him to expose another unguarded flank."

Don

#20
03-30-2005, 02:28 AM
 Don1 Guest Posts: n/a
It's a scientific fact

A "squared second", or "sec^2" is the abbreviation of multiplying a
period of time (t) by itself, and saves on having to use parentheses;
like (t^2 = t times t); or (1 sec^2 = 1 second times 1 second = 1
second^2); or (2 sec^2 = 2 seconds times 2 seconds = 4 seconds^2); or
(3 sec^2 = 3 seconds times 3 seconds = 9 seconds^2)....

Also, while speaking of parentheses, like (m) being the ratio; that is
equal to both of the ratios, f/t and w/g: So that when working with the
formula [(m) = f/t = w/g], it is (absolutely) necessary to transpose
the parentheses along with the symbol; as (m); since the parentheses
constantly remind us that m is a ratio, and _not_ a variable in itself.

Don

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