What is Displacement vector ?
ANSWER:- It is a vector which gives the position of a point with reference to a point other than the origin of the coordinate system. ★The magnitude of displacement vector called distance formula.
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Explain Flight of bird 🕊️ .
Explanation:- When bird flies it strikes the air with its wings,air also exerts a reaction force on bird's wings in opposite direction(by Newton's 3rd law). Look at the figure, in which these reaction forces are represented by ON1 & ON2.The resultant of ON1 & ON2 is ON. It is the net upward force which causes the bird to fly.