Posted by **jackie** on Sunday, August 23, 2009 at 12:51am.

Vector A has a magnitude of 8.00 units and makes an angle of 45.0° with the positive x-axis. Vector B also has a magnitude of 8.00 units and is directed along the negative x-axis. Using graphical methods, find (a) the vector sum A + B and (b) the vector difference A – B.

Could someone please help me?

- AP physics -
**drwls**, Sunday, August 23, 2009 at 5:53am
We can't draw graphs or triangles for you here, but can tell you that A+B and A-B are the bases of isosceles triangles with two equal side lengths of 8. The apex angle is 45 degrees for A+B and 135 degrees for A-B. The vector you want is the third side. Start by drawing vector 8 with its tail at the origin and the arrowhead ponited at 45 degrees into the first quadrant. The connect (add or subtract) vector B from there.

- AP physics -
**emeka**, Sunday, February 16, 2014 at 8:30pm
Vector vector A has a magnitude of 7.60 units and makes an angle of 48.5° counter-clockwise from the positive x-axis. Vector vector B has a magnitude of 8.00 units and is directed along the negative x-axis.

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