Question

A bullet of mass 10 g moving horizontally with a velocity of 400 m/s strikes a wooden block of mass 2 kg which is suspended by light inextensible string of length 5m. As result, the centre of gravity of the block fun to rise a vertical distance of 10 cm. The speed of the bullet after it emerges horizontally from the block will be :
(I) 100 m/s (ii) 80 m/s (iii) 120 m/s (iv) 160 m/s

Answer 1

Answer : (iii) 120 m/s

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