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#485536 - 02/05/09 07:03 PM Re: Physics anyone???? [Re: Dan S.]
4Salt Offline
River Nutrients

Registered: 03/07/00
Posts: 2955
Loc: Lynnwood, WA
If the object at rest is now accelerating at 2 meters per second squared for 6 seconds... wouldn't that be 2, 4, 16, 32, 64, 128?

If so... then 128 mps would be the constant velocity.

10 seconds in it would still be travelling at 128mps.

At 14 seconds it would have been travelling at 128 mps for 8 seconds = 1024 meters + 2+4+16+32+64+128 for a total of 1270 meters?

And to quote you Dan... "or not"! thumbs

It's the 2 meters (squared) part the way it's written that's throwin' me.
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#485539 - 02/05/09 07:09 PM Re: Physics anyone???? [Re: 4Salt]
Rocket Red Offline
River Nutrients

Registered: 02/14/06
Posts: 2533
Loc: Elma
It is 2 (m/s^2) Acceleration is distance over time squared.

Velocity = 0 + 2 (m/s^2) x 6 (s) = 12 m/s. Check my work please.
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#485543 - 02/05/09 07:16 PM Re: Physics anyone???? [Re: Rocket Red]
4Salt Offline
River Nutrients

Registered: 03/07/00
Posts: 2955
Loc: Lynnwood, WA
So 12 meters per second is the constant velocity?
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A day late and a dollar short...

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#485548 - 02/05/09 07:21 PM Re: Physics anyone???? [Re: Rocket Red]
Jason Y Offline
Repeat Spawner

Registered: 01/01/06
Posts: 1309
Loc: Poulsbo
Originally Posted By: Rocket Red
It is 2 (m/s^2) Acceleration is distance over time squared.

Velocity = 0 + 2 (m/s^2) x 6 (s) = 12 m/s. Check my work please.


Somehow thats what she came up with.


And + 1 for whoever said a smarter husband.

I am curently willing to give up the position. You take over the GET payments, House payments, car payments. (J/K)
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#485551 - 02/05/09 07:23 PM Re: Physics anyone???? [Re: 4Salt]
Rocket Red Offline
River Nutrients

Registered: 02/14/06
Posts: 2533
Loc: Elma
Yes, but I feel like I am being used by the cool kids.
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#485560 - 02/05/09 07:34 PM Re: Physics anyone???? [Re: Rocket Red]
Dan S. Offline
It all boils down to this - I'm right, everyone else is wrong, and anyone who disputes this is clearly a dumbfuck.

Registered: 03/07/99
Posts: 16958
Loc: SE Olympia, WA
I sure as hell didn't see any cool kids around here. grin
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#485561 - 02/05/09 07:41 PM Re: Physics anyone???? [Re: Dan S.]
Rocket Red Offline
River Nutrients

Registered: 02/14/06
Posts: 2533
Loc: Elma
Originally Posted By: Dan S.
I sure as hell didn't see any cool kids around here. grin


Wait, seriously?

Who could be cooler than people hanging around answering physics questions on a fishing bulletin board?

Oh, thats right, like pretty much everyone.
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#485635 - 02/06/09 01:33 AM Re: Physics anyone???? [Re: Rocket Red]
Satan Offline
I love me

Registered: 08/22/06
Posts: 1821
Loc: Around the way
I knew that answer on acid once but I forgot it in the morning

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#485674 - 02/06/09 10:13 AM Re: Physics anyone???? [Re: ]
Mikespike Offline
MPD

Registered: 01/02/08
Posts: 2544
Loc: Santa Rosa, CA
Originally Posted By: blue water pro

So here is my question for the physics thread.
Why are the things in science fiction eventually developed? Are sci-fi writers psychic or do they create a tangible goal?


Wow. Someone wrote about fishing with pink worms!?! That is sci-fi right there.

Your question reminds me of a blurb I saw yesterday. In 1868 Jules Verne wrote 20,000 Leagues Under the Sea and created the unimaginable - an atomic powered submarine. The US Navy honored him by naming the first actual nuclear powered sub the "Nautilus". I don't think Verne included any schematics though... grin
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#485695 - 02/06/09 12:01 PM Re: Physics anyone???? [Re: Mikespike]
stlhead Offline
River Nutrients

Registered: 03/08/99
Posts: 6732
"Why are the things in science fiction eventually developed? Are sci-fi writers psychic or do they create a tangible goal?"

Sci-fi writers are time travelers from the future....or aliens.
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#485709 - 02/06/09 12:21 PM Re: Physics anyone???? [Re: stlhead]
Mikespike Offline
MPD

Registered: 01/02/08
Posts: 2544
Loc: Santa Rosa, CA
Originally Posted By: stlhead
"Why are the things in science fiction eventually developed? Are sci-fi writers psychic or do they create a tangible goal?"

Sci-fi writers are time travelers from the future....or aliens.


I just knew there'd be a Repo Man moment in here somewhere, dealing with physics and such... grin

http://www.youtube.com/watch?v=X4QKiYar9pI
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Don't believe everything that you think.

"Holy hell son, you're about as useful as a cock flavored lollipop."

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#485712 - 02/06/09 12:43 PM Re: Physics anyone???? [Re: Mikespike]
Rocket Red Offline
River Nutrients

Registered: 02/14/06
Posts: 2533
Loc: Elma
My grandfather in law is a science fiction author. He sent me one of his books for Christmas. "Signed by the Author". I tried to read it, but gotdamn I just don't get it. It is something about rocket ships, atomic fluxes, neonparticle radiation, wookies, cyborgs, and secret micro chips.

I made it through two chapters, which is enough that when someone in the family asks me if I liked the book I can be like, "Oh, yeah that was interesting". But overall the book is so bad that I put it by the throne where reading is necessary, and I still won't pick it up.

So if Sci-fi writers are time travlers then the future looks really boring.
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#485794 - 02/06/09 05:40 PM Re: Physics anyone???? [Re: Jason Y]
Metalicious Offline
sneaky I am not :)

Registered: 02/06/09
Posts: 48
Classic integral calculus.

The starting point to you question is given as acceleration. The integral of acceleration is velocity, and the integral of velocity is displacement. Conversely, if you were to go the other direction (differential calculus), velocity would be the derivative of displacement and acceleration would be the derivative of velocity. Simple Newtonian mechanics. smile

In math language:

Acceleration is constant = a
Velocity = a(t)+vo
Displacement = [a(t)^2] /2 + v(t) + do

Plug in the numbers. You guys have already solved the velocity question correctly, but no one has given the right displacement answer yet.

v(t) = 2 m/s (6 sec) + 0, (Plus zero because the object started from rest) = 12 m/s.

The displacement has to be solved in two parts, because the object is undergoing acceleration for the first 6 seconds, and travels at constant velocity for the remaining 8 seconds.

d1(v=0m/s,d=0m) = [2m/s^2(6 sec)^2] /2 + 0 m/s(6 sec) + 0 ft = 36 m

d2(a=0m/s^2, v=12m/s, d=36m) = [0m/s^2(8 sec)^2] /2 + 12 m/s(8 sec) + 36 m = 132 m.

An answer is only of value when accompanied by an explanation. Good day, gentlemen. smile

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#485795 - 02/06/09 05:43 PM Re: Physics anyone???? [Re: Metalicious]
Jerry Garcia Offline



Registered: 10/13/00
Posts: 9013
Loc: everett
Sign that man up.



Welcome to the zoo.
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#485796 - 02/06/09 05:46 PM Re: Physics anyone???? [Re: Metalicious]
Rocket Red Offline
River Nutrients

Registered: 02/14/06
Posts: 2533
Loc: Elma


Welcome to the site Nerdalicious.
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#485798 - 02/06/09 05:48 PM Re: Physics anyone???? [Re: Jerry Garcia]
GreenRiver Offline
Spawner

Registered: 01/22/07
Posts: 746
Saw Mat Damon move bout stuff like that.
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#485804 - 02/06/09 06:03 PM Re: Physics anyone???? [Re: GreenRiver]
IrishRogue Offline
Poon it! Poon it! Poon it!

Registered: 08/08/06
Posts: 1714
Loc: Yarrow Point
Metalicious gets a gold star.

DanS gets an F

4Salt gets an F

Ripley gets an F-


---- Brian (B.S. in Physics, '89).

P.S. Still using Physics every day, especially the Gravity part.


Edited by IrishRogue (02/06/09 06:07 PM)
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#485807 - 02/06/09 06:08 PM Re: Physics anyone???? [Re: Metalicious]
Mikespike Offline
MPD

Registered: 01/02/08
Posts: 2544
Loc: Santa Rosa, CA
Originally Posted By: Metalicious
Classic integral calculus.

The starting point to you question is given as acceleration. The integral of acceleration is velocity, and the integral of velocity is displacement. Conversely, if you were to go the other direction (differential calculus), velocity would be the derivative of displacement and acceleration would be the derivative of velocity. Simple Newtonian mechanics. smile

In math language:

Acceleration is constant = a
Velocity = a(t)+vo
Displacement = [a(t)^2] /2 + v(t) + do

Plug in the numbers. You guys have already solved the velocity question correctly, but no one has given the right displacement answer yet.

v(t) = 2 m/s (6 sec) + 0, (Plus zero because the object started from rest) = 12 m/s.

The displacement has to be solved in two parts, because the object is undergoing acceleration for the first 6 seconds, and travels at constant velocity for the remaining 8 seconds.

d1(v=0m/s,d=0m) = [2m/s^2(6 sec)^2] /2 + 0 m/s(6 sec) + 0 ft = 36 m

d2(a=0m/s^2, v=12m/s, d=36m) = [0m/s^2(8 sec)^2] /2 + 12 m/s(8 sec) + 36 m = 132 m.

An answer is only of value when accompanied by an explanation. Good day, gentlemen. smile


Welcome to the board! Enjoy grin

http://www.youtube.com/watch?v=Hrm-rPSCIBw
_________________________
Don't believe everything that you think.

"Holy hell son, you're about as useful as a cock flavored lollipop."

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#485835 - 02/06/09 07:52 PM Re: Physics anyone???? [Re: Mikespike]
4Salt Offline
River Nutrients

Registered: 03/07/00
Posts: 2955
Loc: Lynnwood, WA
I'll gladly take that F IR. moon

It's been a long time since I studied physics. doh

When the question said "accelerates at 2m/s (squared) I was thinking in exponential terms? Kinda like when you jump out of an airplane and gravity accelerates you at 32 feet per second, per second until you reach terminal velocity.

I was always more of a theoretical physics guy anyway... moose
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#485839 - 02/06/09 08:02 PM Re: Physics anyone???? [Re: 4Salt]
snit Offline
Three Time Spawner

Registered: 03/08/99
Posts: 1817
Loc: Wenatchee, WA
Jezus....made me sweat just looking at that problem. I did two tours of duty at the UW and dropped physics both times...changed majors after that. I need another Pendleton.......
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