Question

A body moves with a uniform speed in a circular path of radius r. What is the displacement of body on covering 1/4th of the revolution

Answer 1

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Radius=r

One Forth of the revolution=AB

Distance=(circle)A to B

Displacement=AB

AB²=r²+r² (Pythagoras Theorem)

AB²=2r²

AB=√(2r²)

AB=r√2

The displacement of body on covering 1/4th of the revolution=r√2

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Answer 2

The displacement of body on covering 1/4th of the revolution is r√2.....