In: Physics
Consider an equilateral triangle with sides measuring 1.0 m in length. At each point of the triangle is a +2.0 ?C charge. Calculate the Coulomb force on each charge. Recall that forces are vectors and thus your answer will require a magnitude and direction for each of the three forces.
The force between the two charges is given by the coulombs law,
. .. ... .. . (1)
Where  
 and 
 are two charges,
r is the distance of the separation.
k is constant whose value is ..  

Given,
  

Clearly all charges are equal,
Let's first calculate total charge on first charge . Since charges are equal so similar force will be experienced by all charges.
Force on q1 due to q2,

.. . . . (2)
Force on q1 due to q3
  
. . .. ...............(3)
Now, breaking the components into x and y.

Calculating the sum for forces along x and y axis,

Putting values from eq 2 and 3.


For y axis,

Putting values from 2 and 3.


Net force on charge q1 is only along your axis, since x components cancel out. Only y components add up.


Putting q = 2 C
r = 1 m



Newton
This is the Net force on charge 1 and j denotes the direction along y axis..
Similar force will be experienced by other two charges also.