On Jan 13, 6:02 pm, "Phil Holman" <piholmanc@yourservice> wrote:

"Chris" <Christopher.Man...@gmail.com> wrote in message

news:f8bf2080-10e3-4620-b80f-ea800d725e5e@e32g2000prn.googlegroups.com...

I have written a program for my HP-48 Calculator to make a table of
ballistic trajectory considering real world friction. I did this as a
challenge to myself and as a refresher for my physics and math
skills. Would you guys mind checking my math and physics reasoning in
the little paper I wrote up for it. The paper is not intended to be a
serious peer reviewed document, but it would be nice to have someone
else take a look at it.

Here is the link:

http://proof.chrismaness.com/hp48/

No closed form solution exists for projectile motion with drag (varies
with the square of velocity) so your program (couldn't open the file)
should consist of a series of small time interval steps to recalculate
velocity and position.

Phil H

That's strange. I can down load it and open from here. What error
are you getting?

On Jan 13, 6:48 pm, Randy Poe <poespam-t...@yahoo.com> wrote:

On Jan 13, 7:34 pm, Chris <Christopher.Man...@gmail.com> wrote:

I have written a program for my HP-48 Calculator to make a table of
ballistic trajectory considering real world friction. I did this
as a
challenge to myself and as a refresher for my physics and math
skills. Would you guys mind checking my math and physics reasoning
in
the little paper I wrote up for it. The paper is not intended to
be a
serious peer reviewed document, but it would be nice to have
someone
else take a look at it.

Here is the link:

http://proof.chrismaness.com/hp48/

Thanks, Chris Maness

You want us to go to your FTP site, download and unpack a ZIP,
read the contents and then comment?

It's too much trouble for you to post your calculations
to the newsgroup?

- Randy

I don't like posting calculus in plain text. This is for the reader's
convenience not mine.