What is shot-curciting​

A path that allows most of the current in an electric circuit to flow around or away from the principal elements or devices in the circuit.

Hook's law states that:

where F is the force applied on the spring, k is the spring constant and x the stretch/compression of the spring.
In our problem, the stretch is

while the force applied is the weight of the mass m=200 g=0.2 kg hanging on the spring:

So, we can find the constant of the spring by using Hook's law: