Calculating Shockwave Energy and Velocity for Mass Collapse

[Carl of Fire]

Is it possible to calculate the energy or velocity of a shock-wave needed to collapse a mass of, let's say 5kg.

 

[Antiphon]

Not from the description of the problem as you've given it. It will take a lot less energy to compress a sponge than a rock. Also, you need to define what you mean by collapse. 5% contraction of volume? Compressed to the size of a proton? Etc.