What is the force, in terms of Coulomb's constant, between two electrical charges of #2 C# and #-4 C# that are #12 m # apart?

1 Answer
Mar 28, 2017

Answer:

The force is #=-0.5*10^9 N#

Explanation:

Two charged objects, of charge #q_1 #and #q_2# separated by a
distance r, exert a force on one another.

The magnitude of this force is given by Coulomb's Law :

#F=k(q_1q_2)/r^2#

where k is a constant:

#k=9*10^9NmC^-2#

The direction of the force is toward the second object if the
objects have opposite signs, and away from the second
object if the signs are the same.

Here,

#q_1=2C#

#q_2=-4C#

#r=12m#

#F=(9*10^9*2*(-4))/12^2#

#=-0.5*10^9 N#