What is the force, in terms of Coulomb's constant, between two electrical charges of #8 C# and #-2 C# that are #9 m # apart?

1 Answer
Jan 14, 2016

Answer:

This question simply requires Coulomb's Law: #F =(kq_1q_2)/r^2#. The answer is requested in terms of Coulomb's constant, and is #F =(k*8*-2)/9^2 N =(-16k)/81 N#.

Explanation:

Coulomb's Law gives the force between two charged particles, given the magnitudes of the charge on them and the distance between them.

Coulomb's constant, the #k# in the equation, is #9*10^9 Nm^2C^-2#, but in this case we have been asked to answer in terms of this constant, so we express the answer in terms of #k#.