Question Difficulty

A $0\mathrm{.}52*$kg mass vibrates according to the equation x$=0\mathrm{.}44$cos$(8\mathrm{.}45$t$+1\mathrm{.}79),$ where x is in meters, and tx$=0\mathrm{.}25$m$.$

kinetic energy $=$

J

potential energy $=|$