A bullet of mass 10 g moving horizontally with a velocity of 400 ms –1 strikes of wooden block of mass 2 kg which is suspended by a light inextensible string of length 5 m. As a result the centre of gravity of the block is found to rise a vertical distance of 10 cm. The speed of the bullet after it emerges out horizontally from the block will be
Text Solution
Verified by ExpertsThe correct answer is:
D
During the collision, apply moementum conservation
(0.01)(400) + 0 = V + (0.01)V'
where V = 
V = 
V = 
solving V' = 120 m/sec.
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