In: Physics
A particle with charge 7 µC is located on the x-axis at the point −4 cm , and a second particle with charge 4 µC is placed on the x-axis at 8 cm . What is the magnitude of the total electrostatic force on a third particle with charge −4 µC placed on the x-axis at 2 cm ? The Coulomb constant is 8.9875 × 109 N · m2 /C 2 . Answer in units of N.
Charge 
 is at 
Charge 
 is at 
Charge 
 is at 
Charge 
 is between
the charges 
 and
.
 is to the
left of charge 
 and
 is to the
right of charge 
.
Electrostatic force on charge 
 due to
charge 
 is towards
negative X-axis .

Electrostatic force on charge 
 due to
charge 
 is towards
positive X-axis.

Net electrostatic force on charge 
 is
Magnitude of electrostatic force on charge 
 is
 and
direction is along negative X-axis (towards charge 
 )