Which object has the greatest kinetic energy?
a
a truck with a mass of 3,500 kg moving at 30 m/s
b
a fast pitched baseball with a mass of .5 kg moving at 46.9 m/s
c
a locomotive engine with a mass of 205,000 kg moving 5 m/s
d
a person with a mass of 73 kg running 6 m/s