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clc
v=1.5*10^(-5); // m^2/s
Re_t=5*10^5;
x_t=1.2; // m
rho=1.21; // kg/m^3
u_m=v*Re_t/x_t;
disp("(a) the velocity of the airstream =")
disp(u_m)
disp("m/s")
theta=0.646*x_t/sqrt(Re_t);
F=rho*u_m^2*theta;
D_F=2*F*x_t;
disp("(b) the frictional drag of the plate, D_F =")
disp(D_F)
disp("N")
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