Originally Posted by

**ebaines** First mistake - you seem to have used __radians__ rather than __degrees__ when you determined the values of the sines and cosines. If you look at the diagram it should be obvious that the horizontal component of F1 is positive, since it points to the right - which should tell you right away that you have an error. Same thing with F2y - clearly it should be a positive value.

"Atan" means Arctan.

Ok, I've now got a proper calculator and its looking better.

for F1x I got = 15.15 (2dp)

for F1y I got = 17.72 (2dp)

for F2x I got = -5.29 (2dp)

for F2y I got = 7.28 (2dp)

Fx total = 9.86

Fy total = 15

magnitude = 17.95

angle = 56.66 (2dp)

This looks more along the correct lines.

-paaul