Saturday

April 19, 2014

April 19, 2014

Posted by **matin** on Tuesday, May 15, 2012 at 7:34pm.

- physics -
**Elena**, Wednesday, May 16, 2012 at 7:33amCharge A(q1)

F12 = k•q1•q2/a².

F13 = k•q1•q3/a².

F(A) = sqrt(F12² + F13² - 2•F12•F13•cos 120º).

Charge B(q2)

F21 = k•q1•q2/a².

F23 = k•q2•q3/a².

F(B) = sqrt(F21²+F23²-2•F21•F23•cos120º).

Charge C (g3),

F31 = k•q1•q3/a².

F32 = k•q2•q3/a².

F(C) = sqrt(F31² + F32² - 2•F31•F32•cos 120º).

- physics -
**sara**, Friday, August 17, 2012 at 10:45pmHow did you get F12 and F13 ??

- physics -
**Elena**, Sunday, August 19, 2012 at 2:49pmphysics - sara, Friday, August 17, 2012 at 10:45pm

How did you get F12 and F13 ??

F12 = k•q1•q2/a²=9•10^9•4•10^-6•5•10^-6/0.09=2 N

F13 = k•q1•q3/a² = 9•10^9•4•10^-6•6•10^-6/0.09=2.4 N

F(A) = sqrt(F12² + F13² - 2•F12•F13•cos 120º)=

=sqrt[4+5.76-2•2•2.4(-0.5)] =3.82 N

**Related Questions**

physics - three point charges each of magnitude +q are located at the vertices ...

Physics - Three negative charges with charge -q occupy the vertices of an ...

college physics - Three negative charges with charge -q occupy the vertices of ...

Physics pls anyone can help me? its urgent - Three negative charges with charge...

physics - Three charges of 5 x 10^(-6) C are placed on the vertices of an ...

Physics - Three identical charges of 2.0 uC are placed at the vertices of an ...

physics - pls help me solve this problem.. charges of +2.0, 3.0 and -8.0µC are ...

Physics 212 - Three equal point charges, each with charge 1.50\mu C , are placed...

physics - Three equal charges are placed at the corners of an equilateral ...

physics - the side of an equilateral triangle is 20 cm identical charges of 1.5x...