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Q.

A bag of mass 2Kg hangs by a long thread and a bullet (mass 1kg) comes horizontally with velocity 3 ms–1 and gets caught in the bag. Then for the combined system (bag + bullet)

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a

Momentum is 1kg ms–1

b

KE is 6J

c

Momentum is 0.21 kgm–1

d

KE is 1.5 J

answer is D.

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Detailed Solution

=12m2n2m+m=32=1.5 J
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