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I got this question wrong on a quiz, and I do not understand why. Please help. A truck has four times the mass of a

I got this question wrong on a quiz, and I do not understand why. Please help.

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:

I selected Kt=4Kc

My teacher says Kt=16Kc

I do not understand why.

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