Posted by tumcee on Saturday, April 17, 2010 at 2:28pm.
OK, I found the figure at
http://www.webassign.net/wb/3-30.gif
All you have to do is use a little trig and add up the vertical and horizontal displacements.
Four vectors are being added. In the +y direction, the change in position is
Y = 20 sin 30 + 30 - 20 sin 45
= 25.86 m
You do the +x displacement, which is
X = 20 cos30 -40 + 20 cos 45, which is a negative number.
Use the Pythagorean theorem for the magnitude of the displacement.
The direction angle is in the second quadrant and the tangent of the angle from the +X axis is Y/X
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