A copper cube of mas 200 g slides down on a rough inclined

Question:

A copper cube of mas $200 \mathrm{~g}$ slides down on a rough inclined plane of inclination $37^{\circ}$ at a constant speed. Assume that any loss in mechanical energy goes into the copper block as thermal energy. Find the increase in the temperature of the block as it slides down through $60 \mathrm{~cm}$. Specific heat capacity of copper $=420 \mathrm{~J} / \mathrm{kg}-\mathrm{K}$.

Solution:

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