Exam-style question
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In a particle interaction, if the initial total momentum is 5 kg·m/s, what must the final total momentum be to conserve momentum?.
- A.0 kg·m/s
- B.5 kg·m/s
- C.10 kg·m/s
- D.5 kg·m/s^2
Model answer
What a good answer should say
- 5 kg·m/s
Explanation
Why this works
According to the law of conservation of momentum, the total momentum before the interaction must equal the total momentum after the interaction. Therefore, if the initial total momentum is 5 kg·m/s, the final total momentum must also be 5 kg·m/s.
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