When skylab recentered the earths atmosphere on july, Ask an Expert

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When Skylab recentered the Earth's atmosphere on July 11,19790, it broke into a m,yraid of pieces. One of the largestfragments was a 1770kg lead-lined film vault, and it landed with anestimate speed of 120m/s. What was the kinetic energy of the film vault when it landed?

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