Sat August 13, 2011 By:

Explain the flying of a bird on the basis of parallelogram law of vector addition.

Expert Reply
Mon August 15, 2011
Flight of bird is an example of resultant of two vectors. When the bird flies, it strikes the air with wings A and B towards O along vector AO and vector BO. We know that action and reaction are equal and opposite. Therefore, the air strikes the wings in opposite direction i.e. along vector OA and vector OB, resultant of which is in upward direction which balances the weight of the bird.
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