The Electric Force Between Two Charges Is Equal to a Constant

Short Answer

The electric force between two charges is equal to a constant divided by the distance between the charges squared. Two charges are separated by $1 \mathrm{~m}$ . The force between them is $10 \mathrm{~N}$ . How much work must be done to increase the distance between the charges to $3 \mathrm{~m}$ ?