Electric force of attraction between forces.

[astru025]

Problem:
What is the electric force of attraction between charges of 3 C and -10 C separated by a distance of 5 m?

Equation: F= k x (Q x q / r^2)
3 x -10 / 5^2 = -1.2 x 8.99E9 = 1.08 E10 N.

Using this equation and the answer I found, I still am getting the wrong answer. Not sure what I am doing wrong but any help would be nice!

 

[nasu]

Your calculation does not make sense.
3x(-10)/5^2 does not give that number you show there.
You forgot to include k?
The final result looks OK.

 

[astru025]

So 1.08 E10 is the right answer?