Calculating the energy or velocity of a shockwave required to collapse a mass, such as 5 kg, depends on the material properties and the definition of "collapse." Different materials, like sponges and rocks, require varying amounts of energy for compression. The extent of collapse must also be specified, whether it is a minor volume reduction or a complete compression to atomic scales. Without clear definitions and parameters, accurate calculations cannot be made. Understanding these factors is essential for any meaningful analysis of shockwave effects on mass.