What is the work done to increase the velocity of a car from 36km per hour to 54km per hour if the mass of car is 1500kg
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U = 36×5/18 = 10 m/s
V = 54×5/18 = 15 m/s
Ki = 1/2×1500×10×10 = 75000 J
Kf = 1/2×1500×15×15 = 168750 J
Work = Kf - Ki = 168750-75000 = 93750 J
Work = 93750 J
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