notsosmart4823 notsosmart4823

22-02-2018
Physics

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If a car increases its speed from 20 mph to 60 mph, by what factor does the kinetic energy of the car increase

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Baddie23 Baddie23

22-03-2018

Mass is constant.

Therefore, KE2/KE1 = v2^2/v1^2 = 60^2/30^2 = 4.

Answer is by a factor of 4.

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