Answer to Question #222007 in Physics for caleb villarreal

Question

A spring (k = 2.3 N/m) is attached to a superman doll of mass = 10 kg. If the action figure is hung from the ceiling by this spring, how much would the spring be stretched?’

Answer 1

The string will stop stretching when the force of gravity is equal to the elastic force:

$$F_g=F_e,\\ mg=kx,\\\space\\ x=\frac{mg}{k}=42.6\text m.$$