A $2\mathrm{.}50$ kg object is initially held at rest upon an incline of $60\mathrm{.}0.$

a$)$ If the coefficient of kinetic friction is $0\mathrm{.}750,$ what acceleration does the mass undergo once released?

$m=2\mathrm{.}50$

${}_k=0\mathrm{.}750$

b$)$ If an applied force of $35\mathrm{.}0$ N directed up the incline acts on the mass beginning from rest, what acceleration does the mass undergo, assuming that the coefficient of kinetic friction is $0\mathrm{.}650?$

$a=F_a+mgsin(60)-{}_{k}mgcos(60)$