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A cubical block (of sie 2m) of mass 20 k...

A cubical block (of sie 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/s find out the thickness of layer of liquid (`g=10m//s^(2)`)

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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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