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# Can someone explain the answer to this question for me (Mechanics) watch

1. Got it.. sorry
2. (Original post by Lambert87)
A: Initial Momentum: 8000 x 3 = 24000 kg ms-1
Agreed.

Total final momentum: (8000 x 1) + 5000V

8000 + 5000V = 24000

5000V = 24000 - 8000 = 16000

V = 16000/5000 = 3.2 ms-1
Agreed.

I am completely confused... ?
What is confusing?

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