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During a long jump Olympic champion Carl Lewis's center of mass rose 1.2 m from the launch point to the top of the arc.

During a long jump Olympic champion Carl Lewis's center of mass rose 1.2 m from the launch point to the top of the arc. What minimum speed u; did he need at launch if he was traveling at 6.4 m/s at the top of the arc? V = m/s

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