Q7: A flat plate haxing dimensions of 4ft x 4ft slides down an inclined plane at an angle of 30 ve the horizontal at a speed of 2ft/sec. The inclined plane is lubricated by a thin film of oil having a viscosity of 0.0006 lbf s/ft. The mass of the plate is 1 slug. Determine the thickness of oil film?

Q7: A flat plate haxing dimensions of 4ft x 4ft slides down an inclined plane at an angle of 30 ve the horizontal at a speed of 2ft/sec. The inclined plane is lubricated by a thin film of oil having a viscosity of 0.0006 lbf s/ft. The mass of the plate is 1 slug. Determine the thickness of oil film?

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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Concept explainers

Properties of Fluids

The term fluid represents a type of substance that can easily change its shape under any external pressure/force and can flow. Fluids can acquire any shape in which it is stored and can resist normal stresses but cannot resist shear stress in rest condition. Whenever external shear stress is applied to fluids, it starts to flow. The fluids may be liquid or gas. Example- water, air, etc.

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Q7: A flat plate having dimensions of 4ft x 4ft slides down an inclined plane at an angle of 30ee
the horizontal at a speed of 2ft/sec. The inclined plane is lubricated by a thin film of oil havine
viscosity of 0.0006 Ibf s/ft. The mass of the plate is 1 slug. Determine the thickness of oil film?

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Q1.A
b
A flat plate of area 2.5 x 10° mm is pulled with a speed of 0.4 m/s relative to another plate located at a distance of 0.15 mm from it. Find the force and power required to maintain this speed, if the fluid separating them is having viscosity as 1 poise.
B1. Determine the kinematic viscosity of the fluid between the plates as shown in Figure B1 given the following information: F = 5N h = 0.5mm v = 7m/s L=21 cm w = 10cm SG= 0.80 Moving plate Stationary plate Fluid Figure B1 V
۱۵ Q3/ A dash pot is 0.2 m in diameter and 0.25 m long and it slides down in a vertical cylinder of diameter 0.21 m. The lubricating oil filled in the annular space has a viscosity of 0.5 poise and has a linear velocity profile. When the load on the piston is 25 N, find the speed with which the piston slides down. سرعة الله Dash pot Oil Cylinder- 0.2 m 25 N 0.21 m T 0.25 m
Problem 2 The apparatus sketched in the figure below serves as a viscometer i.e. it can be used to measure the viscosity of a liquid. In the drawing, D is a large reservoir containing a viscous liquid A and E is a cylindrical tube of radius R, open at both ends, surrounding and coaxial with B, which is a cylindrical "bob" of radius êR that is dragged up through the fluid by a frictionless pulley system (C) utilizing a weight W. Determine a design equation that relates the viscosity of the liquid to the geometry of the system and the weight W. Hint: you can assume that the length of the cylindrical tube is sufficiently long for the flow to reach steady state. W E D B
Question 1: An ( 8 Kg ) box slides down a ( 20°) inclined plane while lubricated by a ( 2 mm ) thick film of oil having a kinematic viscosity of ( 5.176 Stoke ) and a specific gravity of ( 0.85 ). If the box has a constant area of (0.2 m´), what is its terminal speed?