%Problem 7
clc; clear all;
a=4;
b=8;
c=8;
F1=300;
F2=100*sqrt(2);
%6.1
%F1 starts at point A1 and ends at point A
A1x=0;A1y=b;A1z=c;
Ax=a;Ay=0;Az=0;
rA1=[A1x,A1y,A1z];
rA=[Ax,Ay,Az];
nF1=(rA-rA1)/norm(rA-rA1);
f1=F1*nF1
%F1 = 100  -200  -200 (lb) (C)
%6.2
%F2 starts at point A2 and ends at point A
A2x=a;A2y=b;A2z=c;
rA2=[A2x,A2y,A2z];
nF2=(rA-rA2)/norm(rA-rA2);
f2=F2*nF2
MA1 =cross(rA2,f2)
MA2=cross(rA,f2)
% MA1 = 0   400  -400 (lb ft) (D)

f1 =

   100  -200  -200


f2 =

     0  -100  -100


MA1 =

     0   400  -400


MA2 =

     0   400  -400

Published with MATLAB® 7.4