What is the minimum energy needed to change the speed of a 1600 kg sport utility vehicle from 15.0 m/s to 40.0 m/s?

Answer 1

Energy = KE2-KE1 = 0.5m*V2^2-0.5m*V1^2 =
800*40^2 - 800*15^2 = 1,100,000 J.