Final answer:
The angle of attack at which the maximum lift is achieved is approximately 45°. Neglecting air resistance, this angle allows for the greatest lift.
Step-by-step explanation:
The angle of attack at which the maximum lift is achieved is approximately 45°. This is true when neglecting air resistance. However, if air resistance is considered, the maximum angle is slightly smaller.
It is interesting to note that the same range is found for two launch angles that sum to 90°. For example, a projectile launched at a 30° angle will have a lower apex than one launched at a 60° angle, but they both have the same range.