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Question

Use Newton's laws of motion to explain the flying of an aeroplane ?

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Solution


According to Newton's First Law of Motion; Every object remains in the state of rest or uniform unless is acted upon by an external unbalanced force. In the case of the aeroplane, if the lift is equal to the weight, there is no change in vertical motion. If the thrust is equal to drag,ther is no change on horizontal motion.

Newton's Second Law of Motion states that

A body of mass (m), subject to a force F undergoes acceleration (a)

F = ma

Hence in this case, the amount of force produced by the lift overcome the gravity to move.

Newton's Third Law of Motion states that every action has an equal and opposite reaction. The four forces acting on the aeroplane helps to maintain a flight. When the angle of attack of the air increases, the resultant force from the deflection of the air both above and below the wing is also a major component to lift. As the air is deflected downwards, it pushes on the wing in an equal and opposite direction.


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