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WI Thread

G

genkaku

Guest
I didn't edit, you can check. But I did do that on purpose. Mindgames, son!

It's been a while since I've fought a good doc.
 
E

Elyssa Xey Hexen

Broken!
Joined
Aug 6, 2008
Messages
19,345
You are actually on SWF much 0.o? I find that hard to believe. But, that means I have no excuse to sleep in late on thursday :(
 
lonejedi

lonejedi

W.I.T.T.Y
BRoomer
Joined
Oct 1, 2005
Messages
2,350
Location
Wisconsin
exarch said:
I need to focus on work, so no smashfest this week or next week at this point.
Also trying to minimize the amount of time I spent on the boards during the day.
But glad I got to see the CF Sacred combo vid 0_o;
Click to expand...
I know this goes against your focus of work, but I think Exarch you need to watch these 3 videos to get an idea of the history of WI, and what it means to play for our state. Enjoy.


This

http://video.google.com/videoplay?docid=-7064335375126057500#

This

http://video.google.com/videoplay?d...=3&start=0&num=10&so=0&type=search&plindex=0#


THIS


http://www.youtube.com/watch?v=TODJ4YSkeOQ (Part 1, just follow the parts on youtube.)


It's 3 hours worth of stuff, watch them in order, but it will be WELL WELL worth it, and you'll have a better understanding on where we come from.
 
Culvers

Culvers

Smash Apprentice
Joined
Jul 21, 2010
Messages
111
Location
Madison, WI
A class of mine got canceled tomorrow so I'm done with classes by like 10 am. If anybody wants to smash tomorrow in madison, call/text me tomorrow at (262)565-7834.
 
sanchaz

sanchaz

Smash Lord
Joined
Jan 27, 2010
Messages
1,614
KenniSpam! said:
Can anyone here help me out with Physics? This is really important.....

Click to expand...
hmm, I can't help you out now, but I can get someone sometime later, would that help, he's pretty good, whens it due. really saying this because I don't know how hard it is, and you must be pretty despeate asking smashboards, unless its super important, I won't call him
 
Culvers

Culvers

Smash Apprentice
Joined
Jul 21, 2010
Messages
111
Location
Madison, WI
if this is like high school physics i think for the second problem "T" is the same as the force of gravity on the 6 kg block, so 6 * -9.8 = 58.8 newtons.
is "a" acceleration?
 
E

Elyssa Xey Hexen

Broken!
Joined
Aug 6, 2008
Messages
19,345
Xeylode = Freshman
Xeylode started out in Math 221. Physics 207 requires Math 221 pre-req.
Xeylode starts physics in spring semester.
Xeylode has only basic high school physics knowledge that anyone in college has.

With no smash tonight I am bored. Wasn't that m number the coefficent of friction or something like that?
 
E

Elyssa Xey Hexen

Broken!
Joined
Aug 6, 2008
Messages
19,345
If that m=.45 is the coefficent of friction, then the friction force made by the blocks on the horizontal plane will be "friction = coefficent of friction * Normal force"

Normal force is the force acting against a surface. Since this surface is flat, it is pretty much the weight of those blocks * gravity.

The 5kg block times 9.81 m/s^2 = 50 Newtons. The 3kg block times 9.81 m/s^2 = 30 Newtons. These are the normal force numbers. So 50newtons times the coefficent of friction (.45) is 20 newtons. The 30 newtons times .45 is 10 newtons. So, the total force of friction between the two blocks is 20 newtons + 10 newtons = 30 newtons. I am pretty much rounding this off to sig figs. Not sure how important that is or if that is even the right number of sig figs since you only gave a single digit sig. fig. to work with.

After that there should be a 6kg worth of force pulling the blocks to the right. Which is 6kg*9.81=60newtons (this is the resultant force). The resultant force minus the force of friction equals 30 newtons. I have no idea what a=? or t=?. I sort of do not get the question since it's just a picture.
 
Quaz

Quaz

Smash Master
Joined
Jul 20, 2004
Messages
3,424
Location
Salem, WI (West of Kenosha)
well we all know that force = mass times acceleration

we also know that that weird squiggly looking M (kinda like cat ears) stands for mu (pronounced mew) and the coefficient of friction.

okay so far we got

M1 = 10 KG
M2 = 30 KG
Ø = 30°
a = ?

Fx1 = T - M1g sinØ = M1a

Fy2 = M2g - T = M2a = M2a

add these 2 equations to eliminate T (that stands for tension btw)

M2g - M1g sinØ = (M1 + M2)a

a =(M2g - M1g sinØ) / (M1 + M2)

a = (30kg)(-9.8m/s²) - (10kg)(-9.8)(0.5) / (30kg + 10kg)

a = (-294 - -49)/(40)

a = -6.125/s²

thats problem one, did it help?? lol

EDIT: whoops messed up a part but I fixed it I think
 
KenniSpam!

KenniSpam!

Smash Master
Joined
Jan 14, 2009
Messages
3,333
Location
WauKe$ha, WI
Quaz said:
well we all know that force = mass times acceleration

we also know that that weird squiggly looking M (kinda like cat ears) stands for mu (pronounced mew) and the coefficient of friction.

okay so far we got

M1 = 30 KG
M2 = 10 KG
Ø = 30°
a = ?

Fx1 = T - M1g sinØ = M1a

Fy2 = M2g - T = M2a = M2a

add these 2 equations to eliminate T (that stands for tension btw)

M2g - M1g sinØ = (M1 + M2)a

a =(M2g - M1g sinØ) / (M1 + M2)

a = (30kg)(-9.8m/s²) - (10kg)(-9.8)(0.5) / (30kg + 10kg)

a = (-294 - -49)/(40)

a = -6.125/s²

thats problem one, did it help?? lol

EDIT: whoops messed up a part but I fixed it I think
Click to expand...
YESSSSSSSSSSSSSSSSSSSSSSSS thank you quaz, ill mm you in melee next time i see you as a reward :)
 
Quaz

Quaz

Smash Master
Joined
Jul 20, 2004
Messages
3,424
Location
Salem, WI (West of Kenosha)
FUUUUUU

I messed it up, AGAIN I got my masses mixed up in that last equation

I think I should just quit physics forever.

EDIT: nvm I fixed it, should be good now. Maybe.
 
O

Ocho(*8*)

Smash Ace
Joined
Jun 30, 2009
Messages
514
2nd problem:

im gunna treat the two blocks on the surface as one block which ill say is of mass, m1=8.
m2 will be the hanging block. friction will mean the force of friciton.

since F = ma (and all three blocks will have the same a)

m1*a = T - friction
T= m1*a + friction

m2*a = m2*g - T
T= m2*a+m2*g

hence
m1*a + friction = m2*a+m2*g

rearrange a little to get

a*(m2-m1) = friction + m2*g

and a = (friction +m2*g) / (m2-m1)

then T = m2*a - m2*g or m1*a + friction



you know that friction = u * normal force

i lurk this thread and i took your class a year ago i think.

im rusty so i can't gaurentee this is correct but i think it is.

edit: i plugged in numbers and got 7.8 m/s/s for the acceleration which makes sense since it should be a positive number thats less than acc of gravity
 
G

genkaku

Guest
I'm working on it.
Waiting on the stupid student gov. to get their paperwork together.

btw, why are the page numbers on this thread magical?
 
sanchaz

sanchaz

Smash Lord
Joined
Jan 27, 2010
Messages
1,614
hey I want to smash tommorow

Plus note: I may be able to get a venue in madison, however, I don't have a laptop to setup the fu cking tournament.
 
MaDWaK

MaDWaK

Smash Journeyman
Joined
Mar 12, 2006
Messages
250
Location
Milwaukee WI
yoo Genkaku do you go to UWM? I dont but im on the east side a lot we should play. im reeeallly good.

also thanks LJ for the link I definitely will try to get there. sounds like a hype tourney and a good way to get back into meelee. and plus Ive been waiting to **** webster up in BB for a while now and it looks like the perfect opportunity.
 
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