A particle of mass \( m \) is moving along the \( x \)-axis with sp...

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A particle of mass \( m \) is moving along the \( x \)-axis with speed \( v \) when it collides with a particle of mass \( 2 \mathrm{~m} \) initially at rest. After the collision, the first particle has come to rest, and the second particle has split into two equal-mass pieces that are shown in the figure. Which of the following statements correctly
\( \mathrm{P} \) describes the speeds of the two pieces ? \( (\theta0) \)

W
Before collision
After collision
(A) Each piece moves with speed \( v \).
(B) Each piece moves with speed v/2.
(C) One of the pieces moves with speed \( v / 2 \), the other moves with speed greater than \( v / 2 \)
(D) Each piece moves with speed greater than v/2.
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