A block with mass m$=7\mathrm{.}5$kg is hung from a vertical

spring. When the mass hangs in equilibrium, the spring

stretches x$=0\mathrm{.}29$m$.$

The mass is given a push downward from its equilibrium

position with an initial speed v$\_(0)=4\mathrm{.}7($m$)/($s$).$ The block

then oscillates on the spring without friction.