Posted by matin on Tuesday, May 15, 2012 at 7:34pm.
Three charges sit on the vertices of an equilateral triangle, the side of which are 30.0 cm long. If the charges are A = +4.0 C, B = +5.0 C, and C = +6.0 C (clockwise from the top vertex), find the force on each charge.

physics  Elena, Wednesday, May 16, 2012 at 7:33am
Charge 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+F23²2•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 10:45pm
How did you get F12 and F13 ??

physics  Elena, Sunday, August 19, 2012 at 2:49pm
physics  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+5.762•2•2.4(0.5)] =3.82 N
Answer This Question
Related Questions
 physics  If the electric potential energy between two charges of 1.5&#...
 physics  Consider a charge of +2.0 C placed at the origin of an XY co...
 Physics  Sphere A, with a charge of +64 C, is positioned at the origin...
 stat  7. A researcher selects a random sample. A 90% confidence interval for a ...
 Physics  3 charges sit on vertical equilateral triangle the side of each is 30....
 physic  3 charges sit on vertical equilateral triangle the side of each is 30.0...
 computer science  . Investigate the values of and such that ...
 Statistics  To test H0: = 80 versus H1: < 80. a simple ...
 physics  A +5.7 C and a 3.5 C charge are placed 25 cm apart. ...
 Physics  Mass 1 (10 kg) rests on a table connected by a string to Mass 2 (5 kg...
More Related Questions