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A cyclist moves along a horizontal road. She pushes on the pedals with a constant power of 250W. The mass of the cyclist and bicycle is 85kg. The total drag force is 0.4V^2, where v is the speed of the cyclist.
i) Calculate the energy provided by the cyclist each minute when the overall efficiency of the cyclists muscles is 65% (in J)
ii) Calculate the drag force and hence the instantaneous acceleration of the cyclist when the speed is 6.0ms1.
Please help me I had the mark scheme to this but couldn’t understand it so please be clear and write even every single small thing you do and write out full equations with no initials or letters to represent just full words.
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First off, thanks a lot for your help. Secondly, will you do it again? 
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