Question

A vertical gap 25 mm wide of infinite extent contains oil of specific gravity 0.95 and viscosity 2.4 Pa s. A metal plate 1.5 m X 1.5 m X 1.6 mm weighing 45 N is to be lifted through the gap at a constant speed of 0.06 m.s. Estimate the force required.​

Answer 1

Answer:

1.58. A vertical gap 25 mm wide of infinite extent contains oil of specific gravity 0.95 and viscosity 2.4 Pa s. A metal plate 1.5 m X 1.5 m X 1.6 mm weighing 45 N is to be lifted through the gap at a constant speed of 0.06 m.s. Estimate the force required.