Essay
Consider a small comet nucleus whose diameter is 1 km and mass is 5 * 1011 kg.It hits Earth head-on, traveling at a speed of 1,000 m/s.How many times larger or smaller is the comet's kinetic energy compared to that of a typical train pulling 20 boxcars whose total mass is
2 * 106 kg and speed is 25 m/s?
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Kinetic energy is equal to 1/2mv2View Answer
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