QUESTION ABOUT ALTITUDE

[bogey1]

i dont know where to go for information and wouldn't know how to word it if i did a google search, so here goes. i have a thunder mug. its a piece of stainless steel (seamless) 6" tall 4" dia with a 2" bore. i packed some black powder in it and placed a (cro-cay) (dont know how to spell it) ball on top of it. the ball weighs about 1/4 lb. after ignition the ball took 18 seconds to reach earth. the mug was pointed straight up. im trying to find out how high the ball went. any ideas?

[Lycanthrope]

OK...I just drank a couple Lycanbrews and that may make me feel smarter than I am........

But......doesn't everything drop at an accleerated rate of 9.8M/s/s?

http://www.glenbrook.k12.il.us/GBSSC...Kin/U1L5b.html

I think we could figure it out from there. But no way could I do that until the morning.

[sjl127]

i dont know where to go for information and wouldn't know how to word it if i did a google search, so here goes. i have a thunder mug. its a piece of stainless steel (seamless) 6" tall 4" dia with a 2" bore. i packed some black powder in it and placed a (cro-cay) (dont know how to spell it) ball on top of it. the ball weighs about 1/4 lb. after ignition the ball took 18 seconds to reach earth. the mug was pointed straight up. im trying to find out how high the ball went. any ideas?

Are you kidding me? Do you know how much of a pain in the ass it is to do these calculations?

It's a lesson in physics and I would have to bust out my old college books about this stuff, but all I remember that would help you out now, is this...

The ball went about 868 yards high. Based on your 18 second observation.

Physics gurus, if you want to check me, assume 9 seconds up, and down based on similar deceleration and acceleration at 9.8 m/s2. Equation,

x=1/2 * a * t^2

[TaePo]

I'll get the easy part: croquet!

Swish.

[bogey1]

Are you kidding me? Do you know how much of a pain in the ass it is to do these calculations?

It's a lesson in physics and I would have to bust out my old college books about this stuff, but all I remember that would help you out now, is this...

The ball went about 868 yards high. Based on your 18 second observation.

Physics gurus, if you want to check me, assume 9 seconds up, and down based on similar deceleration and acceleration at 9.8 m/s2. Equation,

x=1/2 * a * t^2

dont ask me how i did it but i figured 2500 feet..

[bogey1]

I'll get the easy part: croquet!

Swish.

i wasnt even close on that one........

[PA Rifleman]

Copied from
http://www.sjgames.com/gurps/books/h.../artillery.pdf

Long-range artillery fire often takes a while to arrive
at the target. Flight time is subject to many variables:
projectile shape and weight, propellant charge, propellant
temperature and pressure, barrel length and wear,
air temperature and pressure, etc.

Try googling on artillery "flight time".

Would a laser rangefinder help, or would the croquet ball be too small a target?

Unfortunately the flight time isn't symmetrical with the ball's path, as the ball likely reaches terminal velocity before striking the earth.

[bogey1]

Copied from
http://www.sjgames.com/gurps/books/h.../artillery.pdf
Try googling on artillery "flight time".

Would a laser rangefinder help, or would the croquet ball be too small a target?

Unfortunately the flight time isn't symmetrical with the ball's path, as the ball likely reaches terminal velocity before striking the earth.

we didnt see the ball until about one second before impact. i have it on youtube but you cant see the ball. on the original video you can see the ball right before impact.

[Lycanthrope]

dont ask me how i did it but i figured 2500 feet..

Which is pretty close to 833 yards......near to SJ127's post.......

AT this point, I'd have said....damn high....near half a mile.

[bogey1]

Which is pretty close to 833 yards......near to SJ127's post.......

AT this point, I'd have said....damn high....near half a mile.

yep, thats what i was saying. sj127 must have done his homework....