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A machine gun with a mass of 5kg fires a 50g bullet at speed of...

Physics
JAMB 1978
A machine gun with a mass of 5kg fires a 50g bullet at speed of 100ms-1. The recoil speed of the machine gun is
  • A. 0.5 msec-1
  • B. 1.5 msec-1
  • C. 1 msec-1
  • D. 2 msec-1
  • E. 4 msec-1
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Correct Answer: Option C
Explanation
Gun momentum = bullet momentum

5 x v = 0.05 x 100

v = 1 msec-1
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