A shell of mass 10 kg is moving with a velocity of 10ms−1 when it blasts and forms two parts of mass 9 kg and 1 kg respectively. If the 1st mass is stationary, the velocity of the 2nd is:
A
1 m/s
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B
10 m/s
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C
100 m/s
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D
1000 m/s
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Solution
The correct option is C 100 m/s Given that v1=10m/s;m1=10kg v2=0;m2=9kg v3=v;m3=1kg According to conservation of momentum m1v1=m2v2+m3v3 10×10=9×0+1×v⇒v=100m/s