Question

Give rason pieces of bursting cracker fall in all possible directions

Answer 1

his can b explained by law of conservation of momentum, which says total momentum in a system is conserved.
before the bursting of the cracker the total momentum is Zero. . hence after the burst its momentum needs to be Zero according to
law of conservation of momentum.hence the particles fly off in such a way that each one's momentum is nullified by the one flying off in opposite direction.

Answer 2

This can be explained on the law of conservation of momentum when due to explosion some pieces move in the some particular direction then in order to conserve Momentum the remaining pieces move in the opposite direction