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A bomb at rest explodes into large number of tiny fragments. Then:

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the K. E. of all the fragments remain zero

the momentum of all the fragments increases

the momentum of all the fragments is zero

the K. E. of all the fragments is more than zero

answer is A, D.

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Detailed Solution

The initial momentum of the bomb is zero, and so after explosion, it must be zero. Some internal energy will convert into external K.E. of the fragments .

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