What was the kinetic energy of the film vault when it landed?

When Skylab reentered the Earth's atmosphere on July 11, 1979, it broke into a myriad of pieces. One of the largest fragments was a 1770-kg lead-lined film vault, and it landed with an estimated speed of 120 m/s .|||KE = 陆m*V虏 = 陆*1770*120虏 = 12.744E6 J