(Answered) A child on ice skates with a mass of 35 kg and a velocity

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A child on ice skates with a mass of 35 kg and a velocity of 7.5 m/s [S] undergoes a collision with a second child on ice skates with a of mass 45 kg and a velocity of 3.5 m/s [S30oE]. If the two children become entangled during the collision, determine their final velocity.

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