A truck has four times the mass of a car and is moving with twice the speed of the car. If Kt and Kc refer to the kinetic energies of truck and car respectively, it is correct to say that
A) Kt = 16 Kc.
B) Kt = 4 Kc.
C) Kt = 2 Kc.
D) Kt = Kc.
E) Kt = 1/2 Kc.
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