the bullet fired from a gun has momentum, which is
Correct answer: A. Equal to recoil of gun
- A. Equal to recoil of gun
- B. Less than recoil of gun
- C. Greater than recoil of gun
- D. Anything is possible
Explanation
When a bullet is fired from a gun, the gun and bullet exert equal and opposite forces on each other. According to the law of conservation of momentum, the momentum of the bullet is equal in magnitude and opposite in direction to the momentum of the gun's recoil. This ensures that the total momentum of the system (bullet and gun) remains zero, as it was before the firing. Therefore, the bullet's momentum is equal to the recoil of the gun. Other options suggesting different momenta would violate this fundamental principle of physics.
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Displacement, velocity and acceleration describe motion, including the horizontal and vertical components of projectile motion. The chapter connects these quantities with Newton's laws, momentum and impulse, then applies conservation of momentum to collisions, distinguishing elastic collisions from inelastic ones.
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