$($a$)$ How much work is done in raising a $46kg$ crate a distance of $1\mathrm{.}5m$ above a storeroom floor? $($b$)$ What is the change of potential energy as a result of this move? $($c$)$ How much kinetic energy will the crate have as it falls and hits the floor?

$($a$)W=,J$

$($b$)PE=,$ J

$($c$)KE=,J$