Spring Problem- Unknown mass and constant

[C_Conrad8]

Homework Statement

x= .6096 m
F=ma [m- unknown] [a= 9.81 m/s]

Homework Equations

F= kx

The Attempt at a Solution

No idea..


Basically, you are in a cannon. It has a spring.

The only thing I really want to know- how do you solve for the constant when you don't know the mass?

 

[rock.freak667]

Is that all you are given or is there more of the question?