28138 Moving Mass Strikes A Spring Attached To A Second Mass, What Is Maximum Spring Compression?

Moving mass strikes a spring attached to a second mass, what is maximum spring compression? - 28138

A block of mass M1 for a smooth glide with a speed V0 to a second block of mass m2. A spiral spring with spring constant k is compressed and inserted into the second block, so that when he struck by the moving block. What is the maximum compression of spring?

This is the drawing given to the problem:
http://img43.imagevenue.com/img.php?image=28138_mass_spring_drawing_122_1014lo.jpg

Thanks in advance
-tauntingpillow