Question

Give reason: A bird or an airplane can fly in air.

Answer 1

1. Air is a fluid, it also exerts an upward thrust over the object.
2. Birds are able to fly because their wings create airfoils that can split the air.
3. Therefore, because of the upward thrust of air, a bird or an airplane can fly in the air.
4. Aircraft is made from aluminum alloys to give it a low density (to keep it light) and high strength.