Two charges q1 and q2exert a 90 N electrostatic force onto each other when they are 1 m apart. They are moved further away to a distance of 3 m. What will the new electrostatic force be?

Question

10 N

810 N

30 N****

270 N

Please check my answer

Answer 1

nope. Also an inverse-square law, so
3 times the distance means 1/9 the force.