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  • A bomb of mass 60kg at rest,explodes into 2 pieces of masses 20kg and 40 kg respectively.if speed of lighter piece is 10m/sec,then K.E of2nd

A bomb of mass 60kg at rest, explodes into 2 pieces of masses 20kg and 40 kg respectively. if the speed of lighter piece is 10m/sec, then K.E of 2nd

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\\\text{By momentum conservation: } \\ 40 V=20 \times 10$ \\ $V=5\ m / \mathrm{sec}$ \\ $K E=\frac{1}{2} \times 40 \times(5)^{2}$ $=500 \mathrm{J}$

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