A bullet of mass 10 g moving horizontal with a velocity of 
strikes a wood block of mass 2 kg which is suspended by light inextensible string of length 5 m. As result, the centre of gravity of the block found to rise a vertical distance of 10 cm. The speed of the bullet after it emerges of horizontally from the block will be [NEET 2016]
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
According to the law of conservation of momentum,
Also velocity 
of the block just after the collision is
…(ii)
From Eqs. (i) and (ii), we have
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