清空筛选条件
清空筛选条件

Any suggestion on how to solve this problem using Matlab?

1 次查看（过去 30 天）
James Brown
James Brown 2019-2-14
编辑： Stephen23 2019-2-14
How plot the function in the picture by using Matlab?Screenshot_1.png
  1 个评论
Geoff Hayes
Geoff Hayes 2019-2-14
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).

请先登录，再进行评论。

请先登录，再回答此问题。

回答（2 个）

Yasasvi Harish Kumar
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)
Stephen23
Stephen23 2019-2-14
编辑：Stephen23 2019-2-14
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)
For the next parts you should define a simple anonymous function:
>> 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.

类别

在 Help Center 和 File Exchange 中查找有关 MATLAB 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by