A spacecraft of mass \( M \) moves with velocity \( \mathrm{V} \) i...

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A spacecraft of mass \( M \) moves with velocity \( \mathrm{V} \) in
P free space at first, then it explodes breaking into

W two pieces. If after explosion a piece of mass \( m \) comes to rest, the other piece of spacecraft will have a velocity:
(1) \( \frac{M V}{M-m} \)
(2) \( \frac{M V}{M+m} \)
(3) \( \frac{m V}{M-m} \)
(4) \( \frac{m V}{M+m} \)
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