Spring Displacement by Adding Mass

[woaini]

Homework Statement

A spring hanging vertically has a spring constant of 56 N/m. When 2.1kg is hung from it, what is its vertical displacement?

k=56
m=2.1
x=?
g=9.81

Homework Equations

mg = -kx

The Attempt at a Solution

-x = (2.1*9.81)/56 = 0.367875m

Did I setup the equation correctly?

 

[nasu]

Yes, it's OK.