A bullet of mass 
moves horizontally at a speed of 
is fired into a wooden block of mass 
suspended by a long string. The bullet crosses the block and emerges on the other side. If the centre of the mass of the block rises through a height of 
. The speed of the bullet as it emerges from the block is (take, 
)
Text Solution
Verified by ExpertsD
From the given situation,
Initial momentum of the bullet 
Let final velocities of bullet and block are 
and 
respectively.
If the system rises up to height 
then by conservation of energy
By the conservation of linear momentum
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