# Physics

Three vectors are shown in the figure. Their magnitudes are given in arbitrary units. Determine the sum of the three vectors. Give the resultant in terms of (a) magnitude and (b) the angle within the positive x axis.

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1. no figure.

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bobpursley
2. It wont let me insert the figure into the text box.

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3. A is in quadrant one with a length of 44.0 and an angle of 28.
B is in quadrant two with a length of 26.5 and an angle of 56.
C is on the y axis facing down with a length of 31.0

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4. changing each vector to x,y components:
I assume each angle is measured from the x axis, if not, you did not specify, you have to modify this:
A=44cos28 xbar + 44sin28 ybar
B=26.5cos(180-56)+26.5sin(180-56)ybar
C= 0 xbar-31 ybar.

Sum xbars= sum of those above; sum ybars= sum of those ybars above.
Resultant= sqrt(sumxbar^2 + sumybar^2)
angle= arctan(sumybar/sumxbar).

In vectors, in the future, please note how the angles are measured. It is very standard to measure the angles from y axis (or OOO N), clockwise.

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bobpursley

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