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A man of mass m , standing at the bottom...

A man of mass m , standing at the bottom of the staircase of height L climbs it and stands at its top .

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From torricelli's theorem, velocity of efflux `=(2gh)`
Momentum per second carried by water stream (efflux)
`=` density `xx`volume coming out per second `xx` velocity `=rhoxxavxxv=rhoav^(2)`
Hence force on cylinderical cessel `=rhoa2gh`
Cylinder starts to move when reaction force is just equal to maximum force of friction i.e.,
`muMg=rhoa2ghimpliesa=(muM)/(2rhoh)=(0.4xx100)/(2xx10^(3)xx2)=0.01m^(2)`
Area of circular hole `=(pid^(2))/(4)=0.01m^(2)impliesd=sqrt((0.01xx4)/(pi))=0.113`m
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