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All of the following objects are moving at the same speed. Which one has the greatest kinetic energy? A. a bicycle B. a motorcycle C. a car D. a semi tractor-trailer truck



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lulu1991
The answer is D. According to the formula of kinetic energy, E=(1/2)*m*v². When the speed of these objects are the same, the object with the maximum weight has the greatest kinetic energy.
 the one with the greatest mass always has more kinetic energy. so the answer is D

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