How do you find?

Question

How do you find the Spring Constant from these variables?

Mass is .4 kilograms
the distance stretched from rest is .012 meters (also the height)
Use the normal Gravitational constant, 9.81.

Do you find the Gravitational Potential energy first to compensate for the Potential energy elastic or what?

Answer 1

Force = -Kx. You know that the spring force upward is countered by gravitational force.

Thus, you can substitute Spring force with gravitational force.

F = mg = -k (0.012).....solve for K