For part (f), why not include the energy needed for the car to travel 1km in addition to the energy transferred to the air (i.e. why not add your answer of 50kJ to 500kJ from part (d) ) ?
Hello, I’m quite unsure about the e part “calculate power required to overcome air resistance”. Don’t you also have to take into account the power needed to accelerate the car?
No you don’t have to. Have a look at the wording of the question. It says: ‘ … calculate the kinetic energy transferred to the air …’.
Hello, I’m quite confused about question(c), should total energy include energy to restart the car ? In that case , answer will be doubled: mv^2d/s
Can you explain your reasoning a bit more? I’m not sure I understand where your confusion is at the moment.
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