Hydraulics and Fluid Mechanics in ME
The torque required to overcome viscous resistance of a footstep bearing is (where μ = Viscosity of the oil, N = Speed of the shaft, R = Radius of the shaft, and t = Thickness of the oil film)

μπ²NR⁴/60t
μπ²NR²/60t
μπ²NR/60t
μπ²NR³/60t

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Hydraulics and Fluid Mechanics in ME
The flow in a pipe or channel is said to be uniform when

The quantity of liquid flowing per second is constant
The liquid particles at different sections have different velocities
The liquid particles at all sections have the same velocities
Each liquid particle has a definite path

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