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A particle of mass m is moving along the...

A particle of mass `m` is moving along the `x`-axis with speed v when It collides with a particle of mass `2m` 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 describes the speeds of the two places? `(thetagt0)`

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