On the Velority and Energy of Broken Pieces of Spherical Bodies

Abstract

Ball anaele of sealing wax, elalk-powder, plaster of paris or “castone ”pluter are broken by there metlunls; i.e the exple sion of tone' powder, the falling of a ball upon a massive iros plate, and the eolilson of two balls hung like pendulms The breken plees ent be gronpel lato two kinds One of then is eonposed of the large piees and the other, the small ones. Gmeerning the former gronp. the fol lowiag proertied are reegnized: The veloeity of esch brokten plere tends to derrase with the inerease of mass while the kinetie energy tends to inerease The energy expended in beraking halls when dropped upon the iren plate, is as follows: Balls made of ehalk-powder..... 97-98% (of the total kinelie energy), Balls made of sealing-wax ..... ..70-80%; ( ditto ), Balls made of Gastone plauter..alxout 90%( ditto). In the ease of explosion, the broken piees rotate at remarkable spend. as they fly throngh the air. Some, for insanaee. even maker 20 rotntions Verseeond. Further, some experiments to find the strain-distribution. at the instant of larakage were tried