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A bag of mass M hangs by a long thread and a bullet (mass m) comes horizontally with velocity v and gets caught in the bag. Then for the combined system (bag + bullet) which of the following are correct
  • a)
    Momentum is mv 
  • b)
    Momentum is mMv(M + m) 
  • c)
    KE is m2v2(M + m)/2 
  • d)
    KE is Mv2/2 
Correct answer is option 'A,C'. Can you explain this answer?
Verified Answer
A bag of massMhangs by a long thread and a bullet (massm) comes horizo...
Since, Fext = 0
Hence, momentum will remain conserved equal to mv.
and final kinetic energy is 
The correct answers are: Momentum is mv, KE is m2v2(M + m)/2
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Most Upvoted Answer
A bag of massMhangs by a long thread and a bullet (massm) comes horizo...
Since, Fext = 0
Hence, momentum will remain conserved equal to mv.
and final kinetic energy is 
The correct answers are: Momentum is mv, KE is m2v2(M + m)/2
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A bag of massMhangs by a long thread and a bullet (massm) comes horizontally with velocityvand gets caught in the bag. Then for the combined system (bag + bullet) which of the following are correcta)Momentum ismvb)Momentum ismMv(M+m)c)KE ism2v2(M+m)/2d)KE isMv2/2Correct answer is option 'A,C'. Can you explain this answer?
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