Which of the following scenarios best illustrates the principle of conservation of momentum?
Show answer & explanation
Correct answer: C
Explanation
Correct Answer:
When a bullet is fired from a gun, the gun recoils in the opposite direction.
Explanation:
The law of conservation of momentum states that in the absence of external force, the total momentum of a system remains constant. When a bullet is fired, it moves forward with momentum, and to conserve total momentum, the gun moves backward with equal and opposite momentum. This backward movement is known as recoil.
Key Points:
Conservation of momentum applies in an isolated system.
Bullet and gun have equal and opposite momentum.
Total momentum before and after firing remains the same.
Recoil is a direct example of this principle.
Additional Facts:
It is also related to Newton’s Third Law of Motion.
Rocket propulsion is another example of momentum conservation.
The gun–bullet system is considered a closed system.
Important Questions:
Q1: What does the law of conservation of momentum state?
Ans: Total momentum remains constant in the absence of external force.
Q2: What is recoil?
Ans: The backward movement of a gun when a bullet is fired.
Q3: How do rockets move?
Ans: By expelling gases backward, conserving momentum.