Questions
An ice block of mass 8 kg is dragged along a rough horizontal surface (=0.4) uniformly through 42 m. If all the heat produced is completely absorbed by block then mass of ice that melts is ( L= 80 cal/gm, g = 10m/s2)
detailed solution
Correct option is C
work done against frictional force = heat produced for meltingμMgs=JmL m is the mass of ice melt and L is the latent heat of fusion of ice 0.4×8×10×42=4200×m×80 m=4×10-3 kg=4 gmTalk to our academic expert!
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