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17-01-2024
Physics

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In order to maintain speed, the car’s engine must do work equal to the work done by friction and air drag. Assume a 1000 kg car moving at 100 km/h in a high way. The coefficient of rolling friction between the tires and the road is 0.02, the aerodynamic factor of the car is 0.35 and the effective area is 2.5 m2. The density of air is 1.2 /^3. Gasoline has an energy content of 34.6 MJ per liter. Calculate: (a) the energy consumption for a 100 km trip as well as (b) the fuel consumption. Hint: the rotating front wheels create a traction force that drives the car forward.

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