1. The problem statement, all variables and given/known data Basically, a wind turbine's connected to a car alternator. weight of turbine=72 kg length of blade-30 cm. What is required, is the amt of power this wind turbine will produce when the car (to which turbine is attached) is moving at: a) constant speed b) variable speed 2. Relevant equations Not sure whether to use Power=1/2 ρ*Cd*A*(v^2) for wind turbines, or Pressure=0.6*(v^2)for wind pressure on blades. Help please? (If I use the pressure one, we can calculate wind load and power for a set time) 3. The attempt at a solution I tried solving it both ways because I'm not sure which one to use, and I'm getting totally different values!. A little help please?