A metal disc of radius -r- floats on the surface water- The water layer goes down an makes an angle - with the vertical edge of disc- If surface tension of water is T- find the weight of metal disc-

Weight of the metal #10;disc = Total uipward force #10; #10;= Upthrust force + #10;force due to surface tension #10; #10;= Weight of displaced #10 ...

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Byju's Answer

Standard VIII

Physics

Liquid Pressure

A metal disc ...

Question

A metal disc of radius 'r' floats on the surface water. The water layer goes down an makes an angle $Θ$ with the vertical edge of disc. If surface tension of water is T, find the weight of metal disc.

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Solution

Weight of the metal disc = Total uipward force

= Upthrust force + force due to surface tension

= Weight of displaced water + TcosӨ(2π)

= W + 2 π r cos(cos Ө T)

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A metal disc of radius 'r' floats on the surface water. The water layer goes down an makes an angle Θ with the vertical edge of disc. If surface tension of water is T, find the weight of metal disc.

Weight of the metal disc = Total uipward force = Upthrust force + force due to surface tension = Weight of displaced water + TcosӨ(2π) = W + 2 π r cos(cos Ө T)

A metal disc of radius 'r' floats on the surface water. The water layer goes down an makes an angle $Θ$ with the vertical edge of disc. If surface tension of water is T, find the weight of metal disc.

Weight of the metal disc = Total uipward force

= Upthrust force + force due to surface tension

= Weight of displaced water + TcosӨ(2π)

= W + 2 π r cos(cos Ө T)