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Q: What is the kinetic energy of a bullet when a bullet is fired from a gun ?
  • A. Less than that of a gun
  • B. Infinite
  • C. More than that of a gun
  • D. Equivalent to a gun
Correct Answer: Option C - Law of conservation of momentum, states that a free recoiling gun and bullet will have equal momentum in opposite direction. Since the gun is always heavier, it will have lower velocity. but the bullet has higher velocity because the mass of bullet is less than as compare to the gun. When calculating kinetic energy, the kinetic energy of the bullet will be always higher
C. Law of conservation of momentum, states that a free recoiling gun and bullet will have equal momentum in opposite direction. Since the gun is always heavier, it will have lower velocity. but the bullet has higher velocity because the mass of bullet is less than as compare to the gun. When calculating kinetic energy, the kinetic energy of the bullet will be always higher

Explanations:

Law of conservation of momentum, states that a free recoiling gun and bullet will have equal momentum in opposite direction. Since the gun is always heavier, it will have lower velocity. but the bullet has higher velocity because the mass of bullet is less than as compare to the gun. When calculating kinetic energy, the kinetic energy of the bullet will be always higher