[单选题]
06.19: A 60.0-kgball of clay is tosv (m.lz );k 6jbndru:s:p t,ussed vertic oeh;3nz dm4s.ally in the air with an initial speemz4en o3;.h dsd of 4.60 m/s. Ignoring air resistance, what is the change in its potential energy when it reaches its highest point?
