Question

an explosion breaks a stone at rest into two pieces. One piece of mass 2 kg goes towards east with a speed of 10m/sec. the other price flies off with speed of 20 m/sec. what is the mass of other piece. and in what direction should it go.
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Answer 1

Answer:

When an explosion breaks a rock, by the law of conservation of momentum, initial momentum is zero and for the three pieces,Total momentum of the two pieces 1 kg and 2 kg

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The third piece has the same momentum and in the direction opposite to the resultant of these two momenta.

Momentum of the third piece = 20 kg ms

Velocity = 4 ms

Mass of the piece