Question

Two long bar magnets are aligned so that north poles face each other. The magnets are separated by 1 cm, and a repulsive force between the north poles is 0.04 N. When the separation is increased to 2 cm the force will be

Answer 1

When the separation is increased to 2 cm, the force will be 0.01 N.

Step-by-step explanation:

If the force at 1 cm separation is 0.04 N, when you double the separation to 2 cm, the force will be (1/2)^2 = 1/4 of the original force:

0.04 N * (1/4) = 0.01 N