Question

Two charges valued 1 c and 2 c are sitting 200 centimeters apart from one another find the force exerted on the charges by one another

Answer 1

My friend had this for homework and he allowed me to put his answer here.

His answer: F=kq1q2/42 = 4.2 x10-2 N If r -> (1/8)r, r2 -> (1/64)42 and so, F = 64(4.2 x 10-2 N) = 1.69 N

In short, the answer is: 1.69 N