A mass M slides upward along a rough plane surface inclined at angle $=0\mathrm{.}2$ in radians$$to the horizontal. $$Initially the mass has a speed V$0=3\mathrm{.}39$ m$/$s$,$before it slides a distance L $=1\mathrm{.}0$ m up the incline. $$After sliding this distance$$the new speed of the mass isV$0/3$ measured in m$/$s$.$What is the acceleration of the sliding mass? $($Positive denotes acceleration up the incline; negative denotes acceleration down the incline.$)$

A mass M slides upward along a rough plane surface inclined at angle $=0\mathrm{.}2$ in radians$$to the horizontal. $$Initially the mass has a speed V$0=3\mathrm{.}39$ m$/$s$,$before it slides a distance L $=1\mathrm{.}0$ m up the incline. $$After sliding this distance$$the new speed of the mass isV$0/3$ measured in m$/$s$.$What is the acceleration of the sliding mass? $($Positive denotes acceleration up the incline; negative denotes acceleration down the incline.$)$