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Laws Of Motion

Question
CBSEENPH11020406
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A bomb of mass 16 kg at rest explodes into two pieces of masses of 4 kg and 12 kg. The velocity of the 12 kg mass is 4 ms−1 . The kinetic energy of the other mass is

  • 144 J

  • 96 J

  • 288 J

  • 192 J

Solution

C.

288 J

m1v1 = m2v2
KE space equals space 1 half straight m subscript 2 straight v subscript 2 superscript 2 space space equals space 1 half space straight x space 4 space straight x space 144 space equals space 288 space straight J

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