$2)$ Starting from rest, a $12\mathrm{.}0$ kg block slides down a $3\mathrm{.}50$ m long frictionless incline that make a $\backslash (38^\{\backslash$circ$\}\backslash )$ angle with the horizontal.

$($a$)$ Calculate the work done my gravity.

$($b$)$ What is the kinetic energy of the block at the bottom?

Your organized work for problem $2$: