A car with mass of 1000.0 kg accelerates from 0 m/s to 40.0 m/s in 11.0 s. Ignor

Question

A car with mass of 1000.0 kg accelerates from 0 m/s to 40.0 m/s in 11.0 s. Ignore air resistance. The engine has a 24% efficiency, which means that 24% of the thermal energy released by the burning gasoline is converted into mechanical energy.

What volume of gasoline is consumed? Assume that the burning of 1.0 L of gasoline releases 43 MJ of thermal energy.

The answer should be in L and please show work. The average mechanical power output of the engine is 72.726 kW and I think is needed to answer the problem.

Explanation / Answer

a) Calculate the kinetic energy then divide by 11 seconds to get average power. b) Take the kinetic energy and divide by the efficiency to find the energy input. then divide that by 44 MJ.

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