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 件のコメント
Geoff Hayes
2019 年 2 月 14 日
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).
回答 (2 件)
Yasasvi Harish Kumar
2019 年 2 月 14 日
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)
0 件のコメント
Stephen23
2019 年 2 月 14 日
編集済み: Stephen23
2019 年 2 月 14 日
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.
0 件のコメント
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