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2-77 A thin 30-cm x 30-cm flat plate is pulled at 3 m/s hori- zontally through a 3.6-mm-thick oil layer sandwiched between two plates, one stationary and the other moving at a constant velocity of 0.3 m/s, as shown in Fig. P2-77. The dynamic vis- cosity of the oil is 0.027 Pa-s. Assuming the velocity in each oil layer to vary linearly, (a) plot the velocity profile and find the location where the oil velocity is zero and (b) determine the force that needs to be applied on the plate to maintain this motion.

2-77 A thin 30-cm x 30-cm flat plate is pulled at 3 m/s hori- zontally through a 3.6-mm-thick oil layer sandwiched between two plates, one stationary and the other moving at a constant velocity of 0.3 m/s, as shown in Fig. P2-77. The dynamic vis- cosity of the oil is 0.027 Pa-s. Assuming the velocity in each oil layer to vary linearly, (a) plot the velocity profile and find the location where the oil velocity is zero and (b) determine the force that needs to be applied on the plate to maintain this motion.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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2-77 A thin 30-cm x 30-cm flat plate is pulled at 3 m/s hori- zontally through a 3.6-mm-thick oil layer sandwiched between two plates, one stationary and the other moving at a constant velocity of 0.3 m/s, as shown in Fig. P2-77. The dynamic vis- cosity of the oil is 0.027 Pa.s. Assuming the velocity in each oil layer to vary linearly, (a) plot the velocity profile and find the location where the oil velocity is zero and (b) determine the force that needs to be applied on the plate to maintain this motion. |h₁ = 1 mm |h₂ = 2.6 mm Fixed wall V = 3 m/s FIGURE P2-77 Moving wall F Vw = 0.3 m/s W
Transcribed Image Text:2-77 A thin 30-cm x 30-cm flat plate is pulled at 3 m/s hori- zontally through a 3.6-mm-thick oil layer sandwiched between two plates, one stationary and the other moving at a constant velocity of 0.3 m/s, as shown in Fig. P2-77. The dynamic vis- cosity of the oil is 0.027 Pa.s. Assuming the velocity in each oil layer to vary linearly, (a) plot the velocity profile and find the location where the oil velocity is zero and (b) determine the force that needs to be applied on the plate to maintain this motion. |h₁ = 1 mm |h₂ = 2.6 mm Fixed wall V = 3 m/s FIGURE P2-77 Moving wall F Vw = 0.3 m/s W
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