A lead bullet, of initial temperature 
and speed 
penetrates into a solid object and melts. If 
of the kinetic energy is used to heat it, the value of v in 
is (for lead melting point 
, latent heat of fusion 
, specific heat 
)
Text Solution
Verified by ExpertsThe correct answer is:
B
Heat energy required to just melt the bullet
Here, 
Let 
be the speed of bullet, then 
of 
should be equal to Q .
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