What is the work to be done to increase the velocity of a car from 30 km h-' to 60 km h-, if the mass of the car is 1500.
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What is the work to be done to increase the velocity of a car from 30 km h–1 to 60 km h–1 if the mass of the car is 1500 kg? × 1500 kg × (25/3 m s–1)2 = 156250/3 J. The final kinetic energy of the car, Ekf = 1 2 × 1500 kg × (50/3 m s–1)2 = 625000/3 J.
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