How to write this code for friction?

If anybody can help me with this question, it would be much appreciated. Thank you.

[Jos (10584)]

What did you tried yourself so far? People here are very willing to help, provided you show some effort as well.

[Neil Lallkissoon]

This is what I got so far.

function [P,N,Fmax] = friction(theta, W, mu)

N= W.*cosd(theta)

Fmax= mu.*N

theta=[0:90];

plot(Fmax + (W.*sind(theta)))

xlabel('Angle in (degrees)')

ylabel('Force in (pounds)')

title('Question1(ii)')

end

                                       and

function [P,N,F] = prevent_motion(theta, W, mu)

N=W.*cosd(theta);

F=mu*N

theta=[0:90];

plot(F+(W.*sind(theta)))

xlabel('Angle in (degrees)')

ylabel('Force in (pounds)')

title('Question 2(i)')

[Neil Lallkissoon]

I'm having a problem with trying to include the box weight range [100-500lb].

[dpb]

"trying to include the box weight range [100-500lb]."

HINT: See

doc meshgrid