Question

5. Why do we shape aeroplanes like that of a bird ?​

Answer 1

Answer:

Birds use their strong breast muscles to flap their wings and give them the thrust to move throught the air and fly. In a way, birds use a swimming motion to get the lift needed to fly. Plane wings have a similar shape as bird wings, but instead of flapping their wings, we use engines to thrust them into the air and create the lift needed to fly.

Explanation:

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Answer 2

when objects move through fluids , they have to overcome friction acting on them. In this process they lose energy. Efforts are therefore, made to minimize friction. so , objects are given special shapes . where do you think scientists get hints for these specail shapes? From nature ofcourse.

Birds and fishes have to move about in fluids all the time .their bodies must have evolved to shapes . which would make them lose less energy in overcoming friction. thats why aeroplanes were also designed as teg shape of birds and fishes ( streamlined body) to overcome friction and move easily . In fact , all the vehicles are designed to have shapes which reduce fluid friction.