06-11-2022
Physics

Answered

A coin of thickness x is half immersed in a liquid of surface tension T. Circular surface of the coin is vertical. Angle of contact between liquid and metal with which coin is made is 60°. If radius of the coin is r, surface tension force on coin by liquid is,
(1) 4T(2r + x) upwards
(2) 4T(2r + x) downwards
(3) 2T(2r + x) upwards
(4) 2T(2r+x) downwards
(5) T(2r + x) downwards

Answer :

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