Two small electrically charged objects are placed 12 centimeters (cm) apart, where they exert a force of 2 N on each other. How far apart must they be placed in order to exert at force of 8 N on each other?
A) 24 cm
B) 48 cm
C) 9 cm
D) 6 cm
E) 3 cm

Question

Quizplus · Accepted Answer

The force between two charged objects is inversely proportional to the square of the distance between them. So, if the distance is doubled, the force will be reduced by a factor of 4. Therefore, the objects must be placed 24 cm apart in order to exert a force of 8 N on each other.

Two Small Electrically Charged Objects Are Placed 12 Centimeters (Cm)