physics help

[davmac]

i've got a physics test tomorrow and i can't figure out this qs. the answer is b, but i have no idea how to do it. If you get it can you let me know how to do it? thanks
http://img32.photobucket.com/albums/v97/davmac/phys.jpg

[hemi_fan]

Ooo, sorry i cant help u out... ur 1 year ahead of me I guess... :(

[geekdiggy]

if i wasn't sleeping in physics class i was either arguing with the teacher or checking out my friend nina

in other words, can't help ya. sorry

[davmac]

these formulas might help out
http://img32.photobucket.com/albums/v97/davmac/formula.jpg

[gigdy]

isnt that like gaus' law or some crap?

[Fleischmann]

Damn...I've got this at school right know...but it's all magic to me...are you sure that the distances between Q1and P, and between Q2 and P are the same??

And yep Gigdy, that is Gaus' law.

[davmac]

are you sure that the distances between Q1and P, and between Q2 and P are the same??

yup, they are the same b/c i got this qs from a governemt exam, but never mind i figured it out, thanks anyway

[Vansquish]

E = 1/(4*Pi*Epsilon0) * (Q/(R^2))

That is the formula you should use...

Consider each charge separately. The one on top will yield an electric field of magnitude 4x10^3 pointing downwards...the one to the left will yield a field of magnitude 3x10^3 pointing to the right. Obviously the magnitude of the total field must be a vector sum of the two. Use the pythagorean theorem to find it.

[Vansquish]

kk...sorry...I didn't post until you were already done hehe.

[draak666]

That's all in a very distant past for me. Thanks, not!, for bringing it up.

[Vansquish]

Really? What did you do at university Draak?

[SPEEDKILLAR]

Noooooooo, don't ever show me anything that has to do with with physics,

I almost fall of my pc... :cry: :cry: :cry:

[geekdiggy]

what are you doing ON your pc? :lol:

[draak666]

Really? What did you do at university Draak?
Economics. But this stuff was the final year in highschool (I studied Latin-Science). I still recognize some of it, but I completely forgot what it all means. :D

[SPEEDKILLAR]

what are you doing ON your pc? :lol:

Sorry man, but thats none of your business. It only regards me and only
me, what I do ON my pc :lol:

[Vansquish]

My mom's boyfriend almost got a doctorate in Southeast Asian Economics from U of M, and both of my roommates are doing Econ degrees...kind of popular I guess (unlike physics hehehe)

[Zonda11]

I have Physics right now , but we're messn around with momentum problems.

[Maverick7K]

I've got the answer to a similar problem except with another charge at the fourth corner...I can e-mail you a scan of the answer if you want

[Maverick7K]

http://www.geocities.com/maverick_79912/Problem.JPG