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Physics

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An ice skater of mass 55.3 kg stops to tie his shoe and is at rest. A second ice skater of mass 32.7 kg is moving at a velocity of 15.9 m/s when he strikes the first ice skater. After the collision the second ice skater has a velocity of 7.5 m/s at an angle of 45.0 degrees above the direction of the initial velocity.

What is the magnitude of the velocity of the first ice skater after the collision? Give your answer in m/s to the first decimal place.

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