Latent heat of fusion of ice

physicsss
A 58.0 kg ice-skater moving at 6.25 m/s glides to a stop. Assuming the ice is at 0°C and that 53.5 percent of the heat generated by friction is absorbed by the ice, how much ice melts?

Should I first calculate the work? I know I need to use Delta U= Q-W...but what is Delta U in this case?

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