a a a a a

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Randy Bobandy
Randy Bobandy 2016-8-4
评论： Star Strider 2016-8-18
a a a a
  2 个评论
John D'Errico
John D'Errico 2016-8-18
When you remove the question, you make the answer useless to anyone else who might want to ask that question. This is an insult to the person who bothered to waste their time to help you.
Star Strider
Star Strider 2016-8-18
John — TMW will re-post the original if you request them to. Apparently they keep back-up copies.

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Mischa Kim
Mischa Kim 2016-8-5
编辑：Mischa Kim 2016-8-5
Kenneth, check out and run this:
g = 9.81;
L = linspace(1,10,14);
theta_0 = 30;
for t = 0:0.1:60 %time in seconds
theta = theta_0*sin(sqrt(g./L)*t);
x = L.*sind(theta);
y = -L.*cosd(theta);
%creating a rope
r = plot(x,y,'*');
%creating a bob
hold on
b = plot(x(length(x)),y(length(y)),'or','markersize',30,'markerfacecolor','r');
axis([-max(L) max(L) -max(L) 0])
drawnow
delete(r)
delete(b)
end
Code needs to be cleaned up but I think you get the drift.
Also note that I changed your equation for theta to show the non-linear behavior of pendula.

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