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The driver of a 800.0 kg car decides to double the speed from 20.3 m/s to...

The driver of a 800.0 kg car decides to double the speed from 20.3 m/s to 40.6 m/s. What effect would this have on the amount of work required to stop the car, that is, on the kinetic energy of the car?

KEi=___________×105 J

KEf= __________× 105 J
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