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A wheel of radius 1 m rolls forward half...

A wheel of radius `1 m` rolls forward half a revolution on a horizontal ground. The magnitude of the displacement of the point of the wheel initially on contact with the ground is.

A

`2 m`

B

`sqrt(pi^(2)+4)m`

C

`pim`

D

`sqrt(pi^(2)+2m))`

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The correct Answer is:
b
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