notsosmart4823 notsosmart4823
  • 22-02-2018
  • Physics
contestada

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 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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