Any suggestion on how to solve this problem using Matlab?
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How plot the function in the picture by using Matlab?
1 Kommentar
Geoff Hayes
am 14 Feb. 2019
James - what have you tried so far? This seems like homework so please post what you have attempted and discuss what is causing errors or confusion (for you).
Antworten (2)
Yasasvi Harish Kumar
am 14 Feb. 2019
The below code should be able to plot the required.
m = 25;
mu = 0.55;
g = 9.81;
for t = 0:90
F(t+1) = mu*m*g/(cosd(t) + mu*sind(t));
theta(t+1) = t;
end
plot(theta,F)
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Stephen23
am 14 Feb. 2019
Bearbeitet: Stephen23
am 14 Feb. 2019
I know this is homework, but someone needs to show that it is a waste time writing loops, it is much better to write simple vectorized code:
a.1.
>> mu = 0.55;
>> g = 9.81; % m/s/s
>> m = 25; % kg
>> theta = 0:0.5:90;
>> F = mu*m*g./(cosd(theta) + mu*sind(theta));
>> plot(theta,F)
>> fun = @(t) mu*m*g./(cosd(t) + mu*sind(t));
a.2.
>> t150 = fzero(@(t)fun(t)-150,[40,100])
t150 = 66.818
>> fun(t150)
ans = 150
b.
>> tmin = fminsearch(fun,50)
tmin = 28.810
>> fun(tmin)
ans = 118.19
I am sure that you can manage the last tiny bit yourself.
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