Q. A bomb moving with velocity explodes into two pieces of mass ratio . After explosion the smaller piece moves away with velocity . The velocity of larger piece after explosion is

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Solution:

Let the mass of the unexploded bomb be 5m. It explodes into the two pieces of masses m and 4m respectively.
Initial momentum of the unexploded bomb

After explosion, momentum of the smaller piece
and momentum of the larger piece = where and are the velocities of the two pieces respectively.
According to the law of conservation of momentum, we get