A 0.2-kg aluminum plate, initially at 20C, slides down a 15-m-long surface, inclined at a 30 angle to the horizontal.The force of kinetic friction exactly balances the component of gravity down the plane so that the plate, once started, glides down at constant velocity.If 90% of the mechanical energy of the system is absorbed by the aluminum, what is its temperature increase at the bottom of the incline? (Specific heat for aluminum is 900 J/kgC.)