a formula car produces a downward force of 316 n and a drag force of 164.5 n at a velocity of 21 m/s. if a wing with a body area of 2 m2 and a lift coefficient of 0.7 and a drag coefficient of 0.06 is added to the car what is the new total downward and drag forces acting on the car at this velocity? assume wing and car interaction is linear and air density is 1.2 kg/m^3.