A motorboat accelerates uniformly from a velocity of 6.5 m/s to the west to a velocity of 3.5 m/s to the west. If its acceleration was 2.7 m/s2 to the east, how far did it travel during the acceleration

The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.