Which has the highest kinetic energy,assuming all follow the equation,KE = mu2,where m is the mass and u is the velocity? 
A) a one-ton (910 kg) truck traveling at 65 miles per hour (29 m/s)
B) an electron with a mass of 9.11 *10-27 kg traveling at 2.97 * 108 m/s (99% of the speed of light)
C) an oxygen molecule with a mass of 5.31 * 10-26 kg traveling at 394 m/s (roughly its speed at room temperature)
D) Usain Bolt,who has a mass of approximately 94 kg,running at 10 m/s (22.4 miles per hour)
E) an oil tanker with a mass of 3 *107 kg traveling at 9 m/s (20 miles per hour)
Correct Answer:
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