A square metal plate 1.8 m side and 1.8 mm thick weighing 60 N is to be lifted through a vertical gap of 30 mm of infinite extent (Fig. (1)). The oil in the gap has a specific gravity of 0.95 and viscosity of 3 N.s/m². If the metal plate is to be lifted at a constant speed of 0.12 m/s, find the force required.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A square metal plate 1.8 m side and 1.8 mm thick weighing 60 N is to be lifted through a
vertical gap of 30 mm of infinite extent (Fig. (1)). The oil in the gap has a specific gravity of
0.95 and viscosity of 3 N.s/m². If the metal plate is to be lifted at a constant speed of 0.12
m/s, find the force required.
Oil
1.8 mm.
30 mm
W = 60 N
Fig. 1
Transcribed Image Text:A square metal plate 1.8 m side and 1.8 mm thick weighing 60 N is to be lifted through a vertical gap of 30 mm of infinite extent (Fig. (1)). The oil in the gap has a specific gravity of 0.95 and viscosity of 3 N.s/m². If the metal plate is to be lifted at a constant speed of 0.12 m/s, find the force required. Oil 1.8 mm. 30 mm W = 60 N Fig. 1
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