A 42 kg block of ice moving on rough horizontal surface stops due to friction, after sometime. If the initial velocity of the decelerating block is 
, the mass of ice (in kg) that has melted due to the heat generated by the friction is (Latent heat of ice is 
)
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
Initial mass of ice block, 
Initial velocity of ice block, 
Final velocity of ice block, 
Let retardation be a. Using 
equation of motion, we get
as 
Heat generated 
Work done against friction
Let M kg of ice melts due to the heat generated
So, 
.
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