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A cubical block (of side 2m) of mass 20 ...

A cubical block (of side 2m) of mass 20 kg slides on inclined plane lubricated with the oil of viscosity ` eta = 10 ^(-1) ` poise with constant velocity of ` 10 m//sec. (g = 10 m//sec^ 2 ) `. Find out the thickness of layer of liquid in mm.

Text Solution

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`F=F'=etaA(dv)/(dz)=mgsintheta(dv)/(dz)=(v)/(h)`
`implies20xx10xxsin30^(@)=etaxx4xx(10)/(h)`
`impliesh=4xx10^(-3)m=4mm`
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