# Charging slinky

**Electricity and Magnetism**Level 3

Two charged non-conducting spheres, each with charge 1 \(\mu\text{C}\), are placed at the end of a non-conducting spring of natural length 0.1 m and spring constant 1000 N/m. What is the distance the spring is stretched when it comes to rest **in m**?

**Details and assumptions**

- The electrostatic constant is \(9 \times 10^9~\text{Nm}^2/\text{C}^2\).