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When a fire cracker (rocket) explodes in mid air, its fragments fly in such a way that they continue moving in the same path, which the fire cracker would have followed, had it not exploded.
Reason: Explosion of cracker (rocket) occurs due to internal forces only and no external force acts for this explosion.
Detailed Solution
Assertion is false: it is the centre of mass of the fragments that continues along the original path, not the individual fragments. Reason is true: the explosion is caused by internal forces only, so the motion of the centre of mass is unchanged.