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The amount of force needed to pull out a...

The amount of force needed to pull out a regular hexagonal figure made of wire, perpendicular to its plane from liquid of surface tension 'T' will be :-
(assume mass of wire is m, side = a)

A

`12aT + mg`

B

`aT-mg`

C

`12aT`

D

`6aT +mg `

Text Solution

Verified by Experts

The correct Answer is:
A
Each side of hexagon , when it is lifted will experiences force `=2xxaxxT` due to surface tension . So net pulling force requied = force of ST +weight `=6xx2aT +mg =12 aT +mg `
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