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mechanics

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A skydiver is falling straight downward (prior to having deployed his parachute) when he strikes a woman in a hang glider flying horizontally to the east. The skydiver lands on the glider and grabs hold of it. Just prior to this collision, the glider had a speed of 5ms east and the skydiver had a speed of 10ms downward. What is the magnitude of the velocity of the woman and glider immediately after the collision if the skydiver holds on to it? The combined mass of the woman and glider is 120kg and the mass of the skydiver is 80kg.

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