A 0200-Kg Aluminum Plate,initially at 20°C,slides Down a 13

A 0.200-kg aluminum plate,initially at 20°C,slides down a 13.0-m-long surface,inclined at a 25.0° 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/kg⋅°C. )

A) 0.115 C°
B) 0.0538 C°
C) 0.269 C°
D) 0.78 C°
E) 48.5 C°

Correct Answer:

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