Two bodies on elastic spring system

[zvonecar13]

Homework Statement

A body of mass M is connected to a vertical spring.Another body of mass m is placed on it.Calculate the amplitude of the oscillation of that system,with the condition that the body m always stays on top of body M(no jumps).No friction.

Homework Equations

mg=kx
mgh=0.5kx2

The Attempt at a Solution

I have to lock a solution,so can't make mistakes.

 

[gneill]

Hi zvonecar13, Welcome to Physics Forums.

You'll have to show us what you've tried already. What has been your analysis of the problem?