Exam-style question
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What is the principle of conservation of momentum in a closed system during a collision?.
- A.The total momentum before the collision equals the total momentum after the collision.
- B.Momentum is always conserved regardless of external forces.
- C.Momentum can be created or destroyed in a collision.
- D.The momentum of one object increases while the other decreases.
Model answer
What a good answer should say
- The total momentum before the collision equals the total momentum after the collision.
Explanation
Why this works
This statement accurately reflects the principle of conservation of momentum, which states that in a closed system with no external forces, the total momentum remains constant before and after a collision.
Common mistake
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