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///Chapter No 7 Fluid Mechanics
////Example 7.8 Page No:118
/// Find Power required to maintain the speed of upper plate
//Input data
clc;
clear;
dy=1.5*10^-4; //Two horizontal plates are placed in m
mu=0.12; //Space between plates Ns/m**2
A=2.5; //Upper area is required to move in m**2
du=0.6; //Speed rerlated to lower plate in m/s
////(1)Calculation
tau=mu*(du/dy); //Shear stress N/m**2
F=tau*A; //Force in N
P=F*du; //Power required to maintain the speed of upper plate in W
//Output
printf('Shear stress=%f N/m^2 \n ',tau);
printf('Force=%f N \n ',F);
printf('Power required to maintain the speed of upper plate=%f W \n ',P);
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