The rated power of automobile engine is 80kW, the mass is 5T, the resistance is 0.1 times of the vehicle weight, and the acceleration at the speed of 10m / s

F = 50000n * 0.1 = 5000n when the speed is 10m / s, P = FV 80000 = f * 10, f = 8000n because f = 5000, f-f = ma 3000 = 5000A, a = 0.6m/s ^ 2

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