You may want to review (Pages 177 - 182).
For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Using work and energy to calculate speed.
How much kinetic energy did this meteor deliver to the ground?
How does this energy compare to the energy released by a 1.0-megaton nuclear bomb? (A megaton bomb releases the same energy as a million tons of TNT, and 1.0 ton of TNT releases 4.184 109 J of energy.)