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A thin metal disc of radius ‘r floating ...

A thin metal disc of radius ‘r floating on water surface, bends the surface downwards along the perimeter making an angle `theta `with vertical edge of the disc. If the disc displaces a weight of water W and surface tension of water is T, then the weight of metal disc is

A

` 2 pi r T + W `

B

` 2 pi r T cos theta-W `

C

` 2 pi r T cos theta + W`

D

`W- 2 pi r T cos theta `

Text Solution

Verified by Experts

The correct Answer is:
C
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