pHYSICS HELP pLEASE?

Question

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 1680 kg lead-lined film vault, and it landed with a estimated speed of 120 m/s. What was the kinetic energy of this film vault when it landed?

Answer 1

KE=.5*m*v^2
=.5*1680*120^2
=12,096,000 J

J