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Two objects of mass 1 kg and 0.5 kg are ...

Two objects of mass 1 kg and 0.5 kg are moving on linear path with velocity 4 `ms^(-1)` and 2 `ms^(-1)` in the same direction respectively collide with each other. After collision, velocity of first object is 3m`s^(-1)` in the same direction. Find out the velocity of the second object.

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4 `ms^(-1)`
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